[PATCH] Set index_arch_AVX_Fast_Unaligned_Load only for Intel processors

[Pawar, Amit]

>Here is the updated patch to rename PTR_HAS_CPU_FEATURE and PTR_HAS_ARCH_FEATURE to CPU_FEATURES_CPU_P and CPU_FEATURES_ARCH_P.  It also calls get_common_indeces for other processors to detect AVX, AVX2, AVX512, FMA and FMA4.
>This should help fix
>
>https://sourceware.org/bugzilla/show_bug.cgi?id=19583
>
>by setting AVX_Fast_Unaligned_Load only for Intel processors.
>
>OK for master?
OK. I will submit another patch to enable Fast_Copy_Backward.

Thanks,
Amit Pawar