Consistently use the name tinycrypt over uecc

We called in tinycrypt in the file names, but uecc in config.h, all.sh and
other places, which could be confusing. Just use tinycrypt everywhere because
that's the name of the project and repo where we took the files.

The changes were made using the following commands (with GNU sed and zsh):

sed -i 's/uecc/tinycrypt/g' **/*.[ch] tests/scripts/all.sh
sed -i 's/MBEDTLS_USE_UECC/MBEDTLS_USE_TINYCRYPT/g' **/*.[ch] tests/scripts/all.sh scripts/config.pl
diff --git a/include/tinycrypt/ecc.h b/include/tinycrypt/ecc.h
index ede7544..37a7ef1 100644
--- a/include/tinycrypt/ecc.h
+++ b/include/tinycrypt/ecc.h
@@ -68,7 +68,7 @@
  *
  */
 
-#if defined(MBEDTLS_USE_UECC)
+#if defined(MBEDTLS_USE_TINYCRYPT)
 #ifndef __TC_UECC_H__
 #define __TC_UECC_H__
 
@@ -544,4 +544,4 @@
 #endif
 
 #endif /* __TC_UECC_H__ */
-#endif /* MBEDTLS_USE_UECC */
+#endif /* MBEDTLS_USE_TINYCRYPT */
diff --git a/include/tinycrypt/ecc_dh.h b/include/tinycrypt/ecc_dh.h
index 18a4fd2..c680a77 100644
--- a/include/tinycrypt/ecc_dh.h
+++ b/include/tinycrypt/ecc_dh.h
@@ -66,7 +66,7 @@
  *  Security: The curve NIST p-256 provides approximately 128 bits of security.
  */
 
-#if defined(MBEDTLS_USE_UECC)
+#if defined(MBEDTLS_USE_TINYCRYPT)
 #ifndef __TC_ECC_DH_H__
 #define __TC_ECC_DH_H__
 
@@ -130,4 +130,4 @@
 #endif
 
 #endif /* __TC_ECC_DH_H__ */
-#endif /* MBEDTLS_USE_UECC */
+#endif /* MBEDTLS_USE_TINYCRYPT */
diff --git a/include/tinycrypt/ecc_dsa.h b/include/tinycrypt/ecc_dsa.h
index 8065340..cc5eebc 100644
--- a/include/tinycrypt/ecc_dsa.h
+++ b/include/tinycrypt/ecc_dsa.h
@@ -75,7 +75,7 @@
  *          the signer's public key and the signature values (r and s).
  */
 
-#if defined(MBEDTLS_USE_UECC)
+#if defined(MBEDTLS_USE_TINYCRYPT)
 #ifndef __TC_ECC_DSA_H__
 #define __TC_ECC_DSA_H__
 
@@ -138,4 +138,4 @@
 #endif
 
 #endif /* __TC_ECC_DSA_H__ */
-#endif /* MBEDTLS_USE_UECC */
+#endif /* MBEDTLS_USE_TINYCRYPT */