hg: jdk/jdk: 8212481: PPC64: Enable POWER9 CPU detection

[gromero at linux.vnet.ibm.com]

Changeset: 0caa36de8703
Author:    gromero
Date:      2018-10-16 16:26 -0400
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/0caa36de8703

8212481: PPC64: Enable POWER9 CPU detection
Reviewed-by: mdoerr, simonis

! src/hotspot/cpu/ppc/assembler_ppc.hpp
! src/hotspot/cpu/ppc/assembler_ppc.inline.hpp
! src/hotspot/cpu/ppc/vm_version_ppc.cpp
! src/hotspot/cpu/ppc/vm_version_ppc.hpp