x86: Enable three bits in the FamilyModelStepping ECX CPUID bitfield.
x86: Enable three bits in the FamilyModelStepping ECX CPUID bitfield.

These are for the monitor/mwait instructions, SSSE3, and XSAVE.
(transplanted from 5d119a460f153c171e6cd52f5135d2ce52c8c82b)

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin