Fix the rear camera driver for mainline CSI drivers

last time I checked, I got

v4l2_subdev_link_validate_default: width does not match (source 3214170440, sink 4208)
[  646.200511] imx7-csi 30b80000.csi: v4l2_subdev_link_validate_default: height does not match (source 4294901760, sink 3120)
[  646.200529] imx7-csi 30b80000.csi: v4l2_subdev_link_validate_default: media bus code does not match (source 0x00000000, sink 0x00003002)
[  646.200548] imx7-csi 30b80000.csi: v4l2_subdev_link_validate_default: link was "S5K3L6-CIS 3-002d":0 -> "imx8mq-mipi-csi2 30b60000.csi":0
[  646.200574] imx7-csi 30b80000.csi: link validation failed for 'S5K3L6-CIS 3-002d':0 -> 'imx8mq-mipi-csi2 30b60000.csi':0, error -32

when trying to stream.