V4L/DVB: [-next] media: fix vivi build error

vivi uses find_font(), which is only available when FONTS
is enabled, so make vivi depend on FONTS.

ERROR: "find_font" [drivers/media/video/vivi.ko] undefined!
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -559,7 +559,7 @@ config VIDEO_DAVINCI_VPIF
 
 config VIDEO_VIVI
 	tristate "Virtual Video Driver"
-	depends on VIDEO_DEV && VIDEO_V4L2 && !SPARC32 && !SPARC64
+	depends on VIDEO_DEV && VIDEO_V4L2 && !SPARC32 && !SPARC64 && FONTS
 	select FONT_8x16
 	select VIDEOBUF_VMALLOC
 	default n