[media] au0828: remove forced dependency of VIDEO_AU0828 on VIDEO_V4L2

This patch removes the dependendency of VIDEO_AU0828 on VIDEO_V4L2 by
creating a new Kconfig option, VIDEO_AU0828_V4L2, which enables analog
video capture support and depends on VIDEO_V4L2 itself.
With VIDEO_AU0828_V4L2 disabled, the driver will only support digital
television and will not depend on the v4l2-core. With VIDEO_AU0828_V4L2
enabled, the driver will be built with the analog v4l2 support included.
By default, the VIDEO_AU0828_V4L2 option will be set to Y, so as to
preserve the original behavior.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/Kconfig b/drivers/media/usb/Kconfig
index 6746994..0a7d520 100644
--- a/drivers/media/usb/Kconfig
+++ b/drivers/media/usb/Kconfig
@@ -21,7 +21,6 @@
 
 if MEDIA_ANALOG_TV_SUPPORT
 	comment "Analog TV USB devices"
-source "drivers/media/usb/au0828/Kconfig"
 source "drivers/media/usb/pvrusb2/Kconfig"
 source "drivers/media/usb/hdpvr/Kconfig"
 source "drivers/media/usb/tlg2300/Kconfig"
@@ -31,6 +30,7 @@
 
 if (MEDIA_ANALOG_TV_SUPPORT || MEDIA_DIGITAL_TV_SUPPORT)
 	comment "Analog/digital TV USB devices"
+source "drivers/media/usb/au0828/Kconfig"
 source "drivers/media/usb/cx231xx/Kconfig"
 source "drivers/media/usb/tm6000/Kconfig"
 endif