[0/3] x86: correct fencing around CLFLUSH (+some tidying)

Message

Jan Beulich Feb. 23, 2022, 10:11 a.m. UTC

While it'll make backporting of the last patch a little harder,
it seemed better to me to do some cleanup first this time round.

1: drop NOP_DS_PREFIX
2: cpuid: replace more cpufeat_word() uses
3: correct fencing around CLFLUSH

Jan