Documentation: fsl-mc: add iommu-map device-tree binding for fsl-mc bus
The existing IOMMU bindings cannot be used to specify the relationship
between fsl-mc devices and IOMMUs. This patch adds a generic binding for
mapping fsl-mc devices to IOMMUs, using iommu-map property.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>