Some cpuid bit defines are named slightly different from how gcc's cpuid.h calls them.
Define a few more compatibility names to appease software built for gcc:
- bit_PCLMUL alias of bit_PCLMULQDQ
- bit_SSE4_1 alias of bit_SSE41
- bit_SSE4_2 alias of bit_SSE42
- bit_AES alias of bit_AESNI
- bit_CMPXCHG8B alias of bit_CX8
While here, add the misssing 29th bit, bit_F16C.