media: Kconfig: Make DVB_CORE=m possible when MEDIA_SUPPORT=y

A case that CONFIG_MEDIA_SUPPORT is y but we need DVB_CORE=m, and
this doesn't work since DVB_CORE is default MEDIA_DIGITAL_TV_SUPPORT
and then follows MEDIA_SUPPORT.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>

drivers/media/Kconfig

@@ -182,7 +182,7 @@ config MEDIA_CONTROLLER
 #
 
 config DVB_CORE
-	tristate
+	tristate "DVB Core"
 	depends on MEDIA_DIGITAL_TV_SUPPORT
 	depends on (I2C || I2C=n)
 	default MEDIA_DIGITAL_TV_SUPPORT