iommu: arm-smmu: enable clocks and regulators in smmu detach

During smmu detach, arm_smmu_domain_remove_master function is
called which clears SMR, S2CR registers and performs tlb_flush
operation. Enable the required clocks and regulators for the access.

Change-Id: I8317b8bfe95b3b76cd2878d4090dd7b647094f7a
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>