pk_internal: small renaming for mbedtls_pk_get_group_id()

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/library/pk_internal.h b/library/pk_internal.h
index ece2f82..81807f1 100644
--- a/library/pk_internal.h
+++ b/library/pk_internal.h
@@ -85,7 +85,7 @@
 #endif /* !MBEDTLS_PK_USE_PSA_EC_DATA */
 
 #if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
-static inline mbedtls_ecp_group_id mbedtls_pk_get_group_id(const mbedtls_pk_context *pk)
+static inline mbedtls_ecp_group_id mbedtls_pk_get_ec_group_id(const mbedtls_pk_context *pk)
 {
     mbedtls_ecp_group_id id;
 
@@ -125,7 +125,7 @@
 
 static inline int mbedtls_pk_is_rfc8410(const mbedtls_pk_context *pk)
 {
-    mbedtls_ecp_group_id id = mbedtls_pk_get_group_id(pk);
+    mbedtls_ecp_group_id id = mbedtls_pk_get_ec_group_id(pk);
 
     return MBEDTLS_PK_IS_RFC8410_GROUP_ID(id);
 }