MAINTAINERS: add an explicit entry for em28xx

While this file was always maintained, there was no explicit entry
for it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

MAINTAINERS

@@ -2843,6 +2843,14 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/ibm/ehea/
 
+EM28XX VIDEO4LINUX DRIVER
+M:	Mauro Carvalho Chehab <mchehab@redhat.com>
+L:	linux-media@vger.kernel.org
+W:	http://linuxtv.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/usb/em28xx/
+
 EMBEDDED LINUX
 M:	Paul Gortmaker <paul.gortmaker@windriver.com>
 M:	Matt Mackall <mpm@selenic.com>