iommu: arm-smmu: Allow TBUs to opt-out from halting
Halting certain TBUs would cause considerable impact to the system
such as introducing HW deadlocks on demand. Such TBUs should not
participate in being halted for any atos debugging or power collapse
features. Allow such TBUs to be opted-out.
Change-Id: I5ae3d72d0b2536fd4e909b556361236bae282163
Signed-off-by:
Sudarshan Rajagopalan <sudaraja@codeaurora.org>
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