MAINTAINERS: Add Frank Li as reviewer for NXP media drivers

MAINTAINERS: Add Frank Li as reviewer for NXP media drivers

Frank has been reviewing NXP media drivers for a while, and is
volunteering to continue. Add him as a reviewer for the IMX media
drivers.

Also add the NXP i.MX platform mailing list (imx@lists.linux.dev).

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250904161720.514889-1-Frank.Li@nxp.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>