builtins: simplify storage section

The default storage section for initialised data is `.data`. There is no
need to explicitly mark the data segment as `.data` to mirror the
semantics of `__nocommon__`. This reduces the clutter and maintains
compatibility.

Author: compnerd

compiler-rt/lib/builtins/cpu_model/aarch64.c

@@ -30,9 +30,7 @@ typedef struct __ifunc_arg_t {
 
 // LSE support detection for out-of-line atomics
 // using HWCAP and Auxiliary vector
-#if defined(_MSC_VER)
-__declspec(allocate(".data"))
-#else
+#if !defined(_MSC_VER)
 __attribute__((__visibility__("hidden"), __nocommon__))
 #endif
 _Bool __aarch64_have_lse_atomics = false;