arm: mx6: novena: Pull video handling into separate file

Pull all of the video handling into a separate file, since a lot
more code will be added and such code would polute the board file.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/kosagi/novena/Makefile b/board/kosagi/novena/Makefile
index 6fba177..6893b63 100644
--- a/board/kosagi/novena/Makefile
+++ b/board/kosagi/novena/Makefile
@@ -8,4 +8,5 @@
 obj-y	:= novena_spl.o
 else
 obj-y	:= novena.o
+obj-$(CONFIG_VIDEO_IPUV3)	+= video.o
 endif