library: replace occurencies of ECP_LIGHT with PK_HAVE_ECC_KEYS

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/library/oid.c b/library/oid.c
index a580992..47a311b 100644
--- a/library/oid.c
+++ b/library/oid.c
@@ -543,7 +543,7 @@
                         mbedtls_pk_type_t,
                         pk_alg)
 
-#if defined(MBEDTLS_ECP_LIGHT)
+#if defined(MBEDTLS_PK_HAVE_ECC_KEYS)
 /*
  * For elliptic curves that use namedCurve inside ECParams (RFC 5480)
  */
@@ -674,7 +674,7 @@
                         oid_ecp_grp_algid,
                         mbedtls_ecp_group_id,
                         grp_id)
-#endif /* MBEDTLS_ECP_LIGHT */
+#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */
 
 #if defined(MBEDTLS_CIPHER_C)
 /*