drm/msm: pm runtime support for iommu
In particular, attach() and unmap() need pm-runtime get/put to ensure
iommu clks are enabled.
Signed-off-by: 
Rob Clark <robdclark@gmail.com>
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In particular, attach() and unmap() need pm-runtime get/put to ensure
iommu clks are enabled.
Signed-off-by: Rob Clark <robdclark@gmail.com>