[PATCH v8 2/5] iommu/arm-smmu: Add pm_runtime/sleep ops

From: Sricharan R The smmu needs to be functional only when the respective master's using it are active. The device_link feature helps to track such functional dependencies, so that the iommu gets powered when the master device enables itself using pm_runtime. So by

[PATCH v8 2/5] iommu/arm-smmu: Add pm_runtime/sleep ops

From: Sricharan R The smmu needs to be functional only when the respective master's using it are active. The device_link feature helps to track such functional dependencies, so that the iommu gets powered when the master device enables itself using pm_runtime. So by adapting the smmu driver for