[media] MAINTAINERS: add maintainer for CODA video4linux mem2mem driver

Add myself as maintainer for the CODA V4L2 mem2mem driver.

Signed-off-by: Philipp Zabel <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

MAINTAINERS

···
 F:	include/linux/coda*.h
 F:	include/uapi/linux/coda*.h
 
+CODA V4L2 MEM2MEM DRIVER
+M:	Philipp Zabel <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/coda.txt
+F:	drivers/media/platform/coda/
+
 COMMON CLK FRAMEWORK
 M:	Mike Turquette <[e-mail]>
 L:	[e-mail]