Merge branch 'for-3.19/iommu' into for-3.19/dt

...evicetree/bindings/memory-controllers/nvidia,tegra-mc.txt

arch/arm/Kconfig

arch/arm/mach-tegra/Kconfig

arch/arm64/Kconfig

arch/powerpc/include/asm/iommu.h

arch/powerpc/kernel/dma-iommu.c

arch/powerpc/kernel/iommu.c

arch/powerpc/platforms/cell/iommu.c

drivers/Kconfig

drivers/amba/Kconfig

drivers/clk/tegra/clk-divider.c

drivers/clk/tegra/clk-tegra114.c

drivers/clk/tegra/clk-tegra124.c

drivers/clk/tegra/clk-tegra20.c

drivers/clk/tegra/clk-tegra30.c

drivers/clk/tegra/clk.h

drivers/iommu/Kconfig

drivers/iommu/amd_iommu.c

drivers/iommu/arm-smmu.c

drivers/iommu/exynos-iommu.c