[media] drivers: video: cx231xx: Fix dependency for VIDEO_CX231XX_DVB

Fix the following build warning:

warning: (VIDEO_CX231XX_DVB) selects DVB_MB86A20S which has unmet direct dependencies (MEDIA_SUPPORT && DVB_CAPTURE_DRIVERS && DVB_CORE && I2C)
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx231xx/Kconfig

@@ -40,7 +40,7 @@ config VIDEO_CX231XX_ALSA
 
 config VIDEO_CX231XX_DVB
 	tristate "DVB/ATSC Support for Cx231xx based TV cards"
-	depends on VIDEO_CX231XX && DVB_CORE
+	depends on VIDEO_CX231XX && DVB_CORE && DVB_CAPTURE_DRIVERS
 	select VIDEOBUF_DVB
 	select MEDIA_TUNER_XC5000 if !MEDIA_TUNER_CUSTOMISE
 	select MEDIA_TUNER_TDA18271 if !MEDIA_TUNER_CUSTOMISE