media: MAINTAINERS: add documentation files for rkisp1

Add the files:
Documentation/admin-guide/media/rkisp1.rst
Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst

to the Rockchip ISP driver entry in the MAINTAINERS file.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -14886,6 +14886,8 @@ M:	Helen Koike <helen.koike@collabora.com>
 M:	Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
 L:	linux-media@vger.kernel.org
 S:	Maintained
+F:	Documentation/admin-guide/media/rkisp1.rst
+F:	Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst
 F:	drivers/staging/media/rkisp1/
 
 ROCKCHIP RASTER 2D GRAPHIC ACCELERATION UNIT DRIVER