[media] MAINTAINERS: Update go7007 pattern

Commit 7955f03d ("[media] go7007: move out of staging into
drivers/media/usb") moved the files, update the pattern.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>