[X86] Fix CMP and TEST with al/ax/eax/rax to not mark EFLAGS as a use or...

[X86] Fix CMP and TEST with al/ax/eax/rax to not mark EFLAGS as a use or al/ax/eax/rax as a def. Probably doesn't have a functional affect since these aren't used in isel.

llvm-svn: 249994