iommu/arm-smmu: Add support for PRR bit setup

Add an adreno-smmu-priv interface for drm/msm to call into arm-smmu-qcom
and initiate the "Partially Resident Region" (PRR) bit setup or reset
sequence as per request.

This will be used by GPU to setup the PRR bit and related configuration
registers through adreno-smmu private interface instead of directly
poking the smmu hardware.

Suggested-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Bibek Kumar Patro <quic_bibekkum@quicinc.com>
Link: https://lore.kernel.org/r/20241212151402.159102-4-quic_bibekkum@quicinc.com


Signed-off-by: Will Deacon <will@kernel.org>