padlock.c: guard mbedtls_padlock_xcryptcbc by CIPHER_MODE_CBC

Signed-off-by: Yanray Wang <[email protected]>

library/padlock.c

@@ -108,6 +108,7 @@ int mbedtls_padlock_xcryptecb(mbedtls_aes_context *ctx,
     return 0;
 }
 
+#if defined(MBEDTLS_CIPHER_MODE_CBC)
 /*
  * PadLock AES-CBC buffer en(de)cryption
  */
@@ -161,6 +162,7 @@ int mbedtls_padlock_xcryptcbc(mbedtls_aes_context *ctx,
 
     return 0;
 }
+#endif /* MBEDTLS_CIPHER_MODE_CBC */
 
 #endif /* MBEDTLS_VIA_PADLOCK_HAVE_CODE */