Remove asm check for aarch64 aesce

we implement it with aesce intrinsic. No asm needed.

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/aes.c b/library/aes.c
index 668f1d1..bf7d6cb 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -34,7 +34,7 @@
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
 
-#if defined(MBEDTLS_HAVE_ASM) && defined(__aarch64__)
+#if defined(__aarch64__)
 #if !defined(MBEDTLS_AESCE_C) && defined(MBEDTLS_AES_USE_HARDWARE_ONLY)
 #error "MBEDTLS_AES_USE_HARDWARE_ONLY defined, but not all prerequisites"
 #endif