MAINTAINERS: update SIANO drivers

Commit 786baecfe7 ("[media] dvb-usb: move it to
drivers/media/usb/dvb-usb") moved the files, update the pattern.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -7498,7 +7498,7 @@ W:	http://linuxtv.org
 T:	git git://linuxtv.org/media_tree.git
 S:	Odd fixes
 F:	drivers/media/common/siano/
-F:	drivers/media/dvb/siano/
+F:	drivers/media/usb/siano/
 F:	drivers/media/usb/siano/
 F:	drivers/media/mmc/siano