Check MBEDTLS_PK_{PARSE,WRITE}_C requires MBEDTLS_OID_C

- check_config.h: add this dependency check
- mbedtls_config.h: update corresponding requirement documentation

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index af78087..6aa87b8 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -436,24 +436,16 @@
 #error "MBEDTLS_PK_C defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PK_PARSE_C) && !defined(MBEDTLS_PK_C)
+#if defined(MBEDTLS_PK_PARSE_C) && \
+    (!defined(MBEDTLS_PK_C) || !defined(MBEDTLS_OID_C))
 #error "MBEDTLS_PK_PARSE_C defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PK_WRITE_C) && !defined(MBEDTLS_PK_C)
+#if defined(MBEDTLS_PK_WRITE_C) && \
+    (!defined(MBEDTLS_PK_C) || !defined(MBEDTLS_OID_C))
 #error "MBEDTLS_PK_WRITE_C defined, but not all prerequisites"
 #endif
 
-#if defined(MBEDTLS_PK_PARSE_C) && defined(MBEDTLS_PK_HAVE_ECC_KEYS) && \
-    !defined(MBEDTLS_OID_C)
-#error "MBEDTLS_PK_PARSE_C and MBEDTLS_PK_HAVE_ECC_KEYS require MBEDTLS_OID_C"
-#endif
-
-#if defined(MBEDTLS_PK_WRITE_C) && defined(MBEDTLS_PK_HAVE_ECC_KEYS) && \
-    !defined(MBEDTLS_OID_C)
-#error "MBEDTLS_PK_WRITE_C and MBEDTLS_PK_HAVE_ECC_KEYS require MBEDTLS_OID_C"
-#endif
-
 #if defined(MBEDTLS_PLATFORM_EXIT_ALT) && !defined(MBEDTLS_PLATFORM_C)
 #error "MBEDTLS_PLATFORM_EXIT_ALT defined, but not all prerequisites"
 #endif