FROMLIST: iommu: dma-iommu: use common implementation also on ARM architecture

FROMLIST: iommu: dma-iommu: use common implementation also on ARM architecture

This patch replaces ARM-specific IOMMU-based DMA-mapping implementation
with generic IOMMU DMA-mapping code shared with ARM64 architecture. The
side-effect of this change is a switch from bitmap-based IO address space
management to tree-based code. There should be no functional changes
for drivers, which rely on initialization from generic arch_setup_dna_ops()
interface. Code, which used old arm_iommu_* functions must be updated to
new interface.

To avoid build failed on ARCH arm,we mannually fix the following two files that
to use arch_set_dma_ops API

arch/arm/mach-highbank/highbank.c
arch/arm/mach-mvebu/coherency.c

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Conflicts:
	arch/arm/mm/dma-mapping.c

Change-Id: Iffad16a7a511d50cc8e422bc61497f117279c66d
Signed-off-by: Simon <xxm@rock-chips.com>
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
(am from https://patchwork.freedesktop.org/patch/74409/)