Only enable simd_wasm64 on wasm64

Author: wooden-worm

library/std/src/lib.rs

@@ -266,6 +266,7 @@
 )]
 #![cfg_attr(any(windows, target_os = "uefi"), feature(round_char_boundary))]
 #![cfg_attr(target_family = "wasm", feature(stdarch_wasm_atomic_wait))]
+#![cfg_attr(target_arch = "wasm64", feature(simd_wasm64))]
 #![cfg_attr(
     all(any(target_arch = "x86_64", target_arch = "x86"), target_os = "uefi"),
     feature(stdarch_x86_has_cpuid)
@@ -348,7 +349,6 @@
 #![feature(prelude_2024)]
 #![feature(ptr_as_uninit)]
 #![feature(ptr_mask)]
-#![feature(simd_wasm64)]
 #![feature(slice_internals)]
 #![feature(slice_ptr_get)]
 #![feature(slice_range)]