MAINTAINERS: Document that the NXP i.MX 8MQ DCSS driver goes thru drm-misc

As per the discussion on the lists [1], changes to this driver
generally flow through drm-misc. Add a tag in MAINTAINERS to document
this

[1] https://lore.kernel.org/r/20230925054710.r3guqn5jzdl4giwd@fsr-ub1664-121.ea.freescale.net



Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230925154929.1.I3287e895ce8e68d41b458494a49a1b5ec5c71013@changeid

MAINTAINERS

@@ -15239,6 +15239,7 @@ M:	Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
 R:	Lucas Stach <l.stach@pengutronix.de>
 L:	dri-devel@lists.freedesktop.org
 S:	Maintained
+T:	git git://anongit.freedesktop.org/drm/drm-misc
 F:	Documentation/devicetree/bindings/display/imx/nxp,imx8mq-dcss.yaml
 F:	drivers/gpu/drm/imx/dcss/