patch to add AES & PCLMUL intrinsics to gcc

[John-Mark Gurney]

I'd like to get a review of this patch:
https://www.funkthat.com/~jmg/gcc.intrin.patch

This adds the AES and PCLMUL intrinsics for gcc...  This is the next
step in getting a higher performing AES-NI in the kernel while keeping
compatibility w/ gcc (and possibly back porting to 9-stable)...

One question I have is that I copied wmmintrin.h from clang... It has a
license statement, but no copyright statement...  Do I need to add one
from somewhere?

I have verified that these intrinsics get compiled the same way that
clang compiles them.

Thank you for the review.

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."