hg: jdk/jdk: 8234599: PPC64: Add support on recent CPUs and Linux for JEP-352

[gromero at linux.vnet.ibm.com]

Changeset: 5dc3440be041
Author:    gromero
Date:      2019-11-21 17:10 -0300
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/5dc3440be041

8234599: PPC64: Add support on recent CPUs and Linux for JEP-352
Reviewed-by: mbaesken, mdoerr, adinn

! src/hotspot/cpu/ppc/macroAssembler_ppc.cpp
! src/hotspot/cpu/ppc/macroAssembler_ppc.hpp
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/cpu/ppc/stubGenerator_ppc.cpp
! src/hotspot/cpu/ppc/vm_version_ppc.cpp
! src/java.base/unix/native/libnio/ch/FileChannelImpl.c
! test/jdk/java/nio/MappedByteBuffer/PmemTest.java