drivers: video: csi: Add support for i.MX RT11XX

On i.MX RT11XX which has MIPI CSI-2 Rx, image data from the camera sensor
after passing through the camera pipeline (MIPI CSI-2 Rx --> Video Mux -->
CSI) will be implicitly converted to a 32-bits pixel formats. For example,
an input in RGB565 / YUYV (2-bytes format) will become an XRGB32 / XYUV32
(4-bytes format), respectively. Make changes to support this.

Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>