Revert "ARM: dts: msm: Defer regulator disable for sdmmagpie GPU SMMU"

This reverts commit 77465c82("ARM: dts: msm: Defer regulator disable
for sdmmagpie GPU SMMU"). This is needed to ensure GPU CX headswitch off
is not delayed by SMMU driver.

Change-Id: I4ecef94d08ca5791f0515b7002634db5fd86d220
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>