[media] [for,v3.14] sn9c102: fix build dependency

This driver should only build if MEDIA_USB_SUPPORT is set.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Reported-by: NJim Davis <jim.epost@gmail.com>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/staging/media/sn9c102/Kconfig

 config USB_SN9C102
 	tristate "USB SN9C1xx PC Camera Controller support (DEPRECATED)"
-	depends on VIDEO_V4L2
+	depends on VIDEO_V4L2 && MEDIA_USB_SUPPORT
 	---help---
 	  This driver is DEPRECATED, please use the gspca sonixb and
 	  sonixj modules instead.