iommu/exynos: remove calls to Runtime PM API functions

Runtime power management by exynos-iommu driver independently from
master H/W's runtime pm is not useful for power saving since attaching
master H/W in probing time turns on its local power endlessly.
Thus this removes runtime pm API calls.
Runtime PM support is added in the following commits to exynos-iommu
driver.

Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
1 file changed