fix target_feature-related errors

Author: tarcieri

aes/src/armv8/intrinsics.rs

@@ -5,7 +5,7 @@
 use core::arch::{aarch64::uint8x16_t, asm};
 
 /// AES single round encryption.
-#[inline(always)]
+#[target_feature(enable = "aes")]
 pub(super) unsafe fn vaeseq_u8(mut data: uint8x16_t, key: uint8x16_t) -> uint8x16_t {
     asm!(
         "AESE {d:v}.16B, {k:v}.16B",
@@ -41,7 +41,7 @@ pub(super) unsafe fn vaesmcq_u8(mut data: uint8x16_t) -> uint8x16_t {
 }
 
 /// AES inverse mix columns.
-#[inline(always)]
+#[target_feature(enable = "aes")]
 pub(super) unsafe fn vaesimcq_u8(mut data: uint8x16_t) -> uint8x16_t {
     asm!(
         "AESIMC {d:v}.16B, {d:v}.16B",