Misc updates:

 - Extend the x86 family/model macros with a steppings dimension,
   because x86 life isn't complex enough and Intel uses steppings to
   differentiate between different CPUs. :-/

 - Convert the TSC deadline timer quirks to the steppings macros.

 - Clean up asm mnemonics.

 - Fix the handling of an AMD erratum, or in other words, fix a kernel erratum.

Signed-off-by: Ingo Molnar <mingo@kernel.org>