[PATCH v2 0/3] powerpc: Add POWER9 cputable entry

[Michael Neuling]

Add CPU table entry for POWER9

v2:
 Updates based on comments from mpe:
  - reuse user features from POWER8
  - remove "Hacked up" from comment
  - gave oprofile name POWER9
  - removed untested power8 machine check hook
  - used defines for tlb init code
  - removed pmu init from setup code
  - added POWER9 to CPU_FTRS_ALWAYS
  - reworded comment on common flush_tlb_* code
  - moved to CPU_FTR_ARCH_300 to be consistent with user bit