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Power ISA 3.1 has dropped transactional memory support, this patch is to disable HTM feature for power10 and later by default. Bootstrapped/regtested on powerpc64le-linux-gnu P8 and P10. gcc/ChangeLog: * config/rs6000/rs6000.c (rs6000_option_override_internal): Use OPTION_MASK_DIRECT_MOVE for Power8 target_enable instead of OPTION_MASK_HTM. * config/rs6000/rs6000-cpus.def (ISA_2_7_MASKS_SERVER): Remove OPTION_MASK_HTM. (RS6000_CPU): Add OPTION_MASK_HTM to power8, power9 and powerpc64le entries.
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