replace target arch macros in padlock

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/padlock.c b/library/padlock.c
index f42c40f..563d40e 100644
--- a/library/padlock.c
+++ b/library/padlock.c
@@ -31,7 +31,7 @@
 
 #include <string.h>
 
-#if defined(MBEDTLS_HAVE_X86)
+#if defined(MBEDTLS_VIA_PADLOCK_HAVE_CODE)
 
 /*
  * PadLock detection routine
@@ -162,6 +162,6 @@
     return 0;
 }
 
-#endif /* MBEDTLS_HAVE_X86 */
+#endif /* MBEDTLS_VIA_PADLOCK_HAVE_CODE */
 
 #endif /* MBEDTLS_PADLOCK_C */