"isr_enable_lock" was used to protect pmu's isr_enabled flag
and pmu enable/disable calls
Instead of this extra lock, we can reuse "isr_mutex" for this
purpose
Bug 200014542
Bug 200014887
Change-Id: Ifbb7d6108effc132266a20517820e470d52a7110
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/453348
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>