media: MAINTAINERS: camss: Add Robert Foss as co-maintainer

I would like to contribute some of my time to co-maintain the CAMSS
driver. I'm currently working to extend CAMSS to new hardware platforms.

Signed-off-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

MAINTAINERS

@@ -14466,6 +14466,7 @@ W:	https://wireless.wiki.kernel.org/en/users/Drivers/ath9k
 F:	drivers/net/wireless/ath/ath9k/
 
 QUALCOMM CAMERA SUBSYSTEM DRIVER
+M:	Robert Foss <robert.foss@linaro.org>
 M:	Todor Tomov <todor.too@gmail.com>
 L:	linux-media@vger.kernel.org
 S:	Maintained