iommu/msm: Add GDSC regulator control

The IOMMU hardware blocks are power-gated by GDSCs which
need to be enabled prior to programming the IOMMU hardware.

Change-Id: I5b4e5a0a60ce672c1180faaf3a8344d72a6ebe5e
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
3 files changed