iommu/exynos: Add system suspend/resume support
When system goes into suspend state, iommu should save it's state and
restore after system resume. This is handled by 'late' pm ops to ensure
that sysmmu will be suspended after its master devices and restored
before them.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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