Since we started adding "POWER" prefix to 64bit PMU SPRs, let's finish
the transition and fix MMCRA and define a supermode version of it.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: NTom Musta <tommusta@gmail.com>
Signed-off-by: NAlexander Graf <agraf@suse.de>