rockchip: video: rk3399: enable HDMI output (from the rk_vop) for the RK3399

This commit adds a driver for the RK3399 VOPs capable and all the
necessary plumbing to feed the HDMI encoder. For the VOP-big, this
correctly tracks the ability to feed 10bit RGB data to the encoder.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/rockchip/Makefile b/drivers/video/rockchip/Makefile
index 9477ad0..495d5f7 100644
--- a/drivers/video/rockchip/Makefile
+++ b/drivers/video/rockchip/Makefile
@@ -8,6 +8,7 @@
 ifdef CONFIG_VIDEO_ROCKCHIP
 obj-y += rk_vop.o
 obj-$(CONFIG_ROCKCHIP_RK3288) += rk3288_vop.o
+obj-$(CONFIG_ROCKCHIP_RK3399) += rk3399_vop.o
 obj-$(CONFIG_DISPLAY_ROCKCHIP_EDP) += rk_edp.o
 obj-$(CONFIG_DISPLAY_ROCKCHIP_LVDS) += rk_lvds.o
 obj-$(CONFIG_DISPLAY_ROCKCHIP_HDMI) += rk_hdmi.o