[compiler-rt] [compiler-rt][AArch64] Provide basic implementations of SME memcpy/memmove in case of strictly aligned memory access (PR #138250)

[Victor Campos via llvm-commits]

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@@ -22,3 +23,46 @@ const void *__arm_sc_memchr(const void *src, int c,
 
   return NULL;
 }
+
+#ifndef __ARM_FEATURE_UNALIGNED
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vhscampos wrote:

@sdesmalen-arm I have split out the function in different files in order to enable the selection of the better implementation via CMake logic.

https://github.com/llvm/llvm-project/pull/138250