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Add a DT node for the i.MX8MP ISI instance, and model to connection to
two CSI-2 receivers (CSIS).
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>