dt-bindings: media: nxp,imx8-isi: Add i.MX8ULP ISI compatible string

Add the compatible string support for i.MX8ULP ISI.

Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20241012084732.1036652-3-guoniu.zhou@oss.nxp.com


Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>