[media] s5p-mfc: Remove special configuration of IOMMU domain

The main reason for using special configuration of IOMMU domain was the
problem with MFC firmware, which failed to operate properly when placed
at 0 DMA address. Instead of adding custom code for configuring each
variant of IOMMU domain and architecture specific glue code, simply use
what arch code provides and if the DMA base address equals zero, skip
first 128 KiB to keep required alignment. This patch also make the driver
operational on ARM64 architecture, because it no longer depends on ARM
specific DMA-mapping and IOMMU glue code functions.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Tested-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>