Switch library and tests to the x509_oid module

```
git grep -l -P 'mbedtls_oid_get_(?!numeric_string\b)' | xargs perl -i -pe 's/\bmbedtls_oid_get_(?!numeric_string\b)/mbedtls_x509_oid_get_/'
./framework/scripts/code_style.py --since HEAD~1 --fix
```

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/pkcs7.c b/library/pkcs7.c
index 3c5040b..cfe570a 100644
--- a/library/pkcs7.c
+++ b/library/pkcs7.c
@@ -480,7 +480,7 @@
         return ret;
     }
 
-    ret = mbedtls_oid_get_md_alg(&signed_data->digest_alg_identifiers, &md_alg);
+    ret = mbedtls_x509_oid_get_md_alg(&signed_data->digest_alg_identifiers, &md_alg);
     if (ret != 0) {
         return MBEDTLS_ERR_PKCS7_INVALID_ALG;
     }
@@ -659,7 +659,7 @@
         return MBEDTLS_ERR_PKCS7_CERT_DATE_INVALID;
     }
 
-    ret = mbedtls_oid_get_md_alg(&pkcs7->signed_data.digest_alg_identifiers, &md_alg);
+    ret = mbedtls_x509_oid_get_md_alg(&pkcs7->signed_data.digest_alg_identifiers, &md_alg);
     if (ret != 0) {
         return ret;
     }
diff --git a/library/x509.c b/library/x509.c
index e0d54b6..a3d7a18 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -208,7 +208,7 @@
     p += md_oid.len;
 
     /* Get md_alg from md_oid */
-    if ((ret = mbedtls_oid_get_md_alg(&md_oid, md_alg)) != 0) {
+    if ((ret = mbedtls_x509_oid_get_md_alg(&md_oid, md_alg)) != 0) {
         return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_ALG, ret);
     }
 
@@ -282,7 +282,7 @@
             return ret;
         }
 
-        if ((ret = mbedtls_oid_get_md_alg(&alg_id, md_alg)) != 0) {
+        if ((ret = mbedtls_x509_oid_get_md_alg(&alg_id, md_alg)) != 0) {
             return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_ALG, ret);
         }
 
@@ -719,7 +719,7 @@
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if ((ret = mbedtls_oid_get_sig_alg(sig_oid, md_alg, pk_alg)) != 0) {
+    if ((ret = mbedtls_x509_oid_get_sig_alg(sig_oid, md_alg, pk_alg)) != 0) {
         return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG, ret);
     }
 
@@ -904,7 +904,7 @@
                           (name->val.tag != MBEDTLS_ASN1_PRINTABLE_STRING) &&
                           (name->val.tag != MBEDTLS_ASN1_IA5_STRING);
 
-        if ((ret = mbedtls_oid_get_attr_short_name(&name->oid, &short_name)) == 0) {
+        if ((ret = mbedtls_x509_oid_get_attr_short_name(&name->oid, &short_name)) == 0) {
             ret = mbedtls_snprintf(p, n, "%s=", short_name);
         } else {
             if ((ret = mbedtls_oid_get_numeric_string(p, n, &name->oid)) > 0) {
@@ -1044,7 +1044,7 @@
     size_t n = size;
     const char *desc = NULL;
 
-    ret = mbedtls_oid_get_sig_alg_desc(sig_oid, &desc);
+    ret = mbedtls_x509_oid_get_sig_alg_desc(sig_oid, &desc);
     if (ret != 0) {
         ret = mbedtls_snprintf(p, n, "???");
     } else {
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 959ae21..5528763 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -926,7 +926,7 @@
         /*
          * Detect supported extensions
          */
-        ret = mbedtls_oid_get_x509_ext_type(&extn_oid, &ext_type);
+        ret = mbedtls_x509_oid_get_x509_ext_type(&extn_oid, &ext_type);
 
         if (ret != 0) {
             /* Give the callback (if any) a chance to handle the extension */
@@ -1692,7 +1692,7 @@
     const char *sep = "";
 
     while (cur != NULL) {
-        if (mbedtls_oid_get_extended_key_usage(&cur->buf, &desc) != 0) {
+        if (mbedtls_x509_oid_get_extended_key_usage(&cur->buf, &desc) != 0) {
             desc = "???";
         }
 
@@ -1721,7 +1721,7 @@
     const char *sep = "";
 
     while (cur != NULL) {
-        if (mbedtls_oid_get_certificate_policies(&cur->buf, &desc) != 0) {
+        if (mbedtls_x509_oid_get_certificate_policies(&cur->buf, &desc) != 0) {
             desc = "???";
         }
 
diff --git a/library/x509_csr.c b/library/x509_csr.c
index bba9eaa..0a77bef 100644
--- a/library/x509_csr.c
+++ b/library/x509_csr.c
@@ -114,7 +114,7 @@
         /*
          * Detect supported extensions and skip unsupported extensions
          */
-        ret = mbedtls_oid_get_x509_ext_type(&extn_oid, &ext_type);
+        ret = mbedtls_x509_oid_get_x509_ext_type(&extn_oid, &ext_type);
 
         if (ret != 0) {
             /* Give the callback (if any) a chance to handle the extension */
diff --git a/library/x509write_crt.c b/library/x509write_crt.c
index 4bacdad..6cc281a 100644
--- a/library/x509write_crt.c
+++ b/library/x509write_crt.c
@@ -413,8 +413,8 @@
         return MBEDTLS_ERR_X509_INVALID_ALG;
     }
 
-    if ((ret = mbedtls_oid_get_oid_by_sig_alg(pk_alg, ctx->md_alg,
-                                              &sig_oid, &sig_oid_len)) != 0) {
+    if ((ret = mbedtls_x509_oid_get_oid_by_sig_alg(pk_alg, ctx->md_alg,
+                                                   &sig_oid, &sig_oid_len)) != 0) {
         return ret;
     }
 
diff --git a/library/x509write_csr.c b/library/x509write_csr.c
index 74991f3..f3dc9d9 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -228,8 +228,8 @@
         return MBEDTLS_ERR_X509_INVALID_ALG;
     }
 
-    if ((ret = mbedtls_oid_get_oid_by_sig_alg(pk_alg, ctx->md_alg,
-                                              &sig_oid, &sig_oid_len)) != 0) {
+    if ((ret = mbedtls_x509_oid_get_oid_by_sig_alg(pk_alg, ctx->md_alg,
+                                                   &sig_oid, &sig_oid_len)) != 0) {
         return ret;
     }