ARM: dts: rk3288-evb: add demo for hdmi

To support HDMI 4K output, hdmi connect to vopb by default.

Change-Id: I7cc184a7399954e47b4f44d02769fd43263e549b
Signed-off-by: Jerry Xu <xbl@rock-chips.com>

Author: Jerry Xu

arch/arm/boot/dts/Makefile

@@ -530,6 +530,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rk3288-evb-android-act8846-edp.dtb \
 	rk3288-evb-android-rk808-edp.dtb \
 	rk3288-evb-android-rk818-edp.dtb \
+	rk3288-evb-android-rk818-hdmi.dtb \
 	rk3288-evb-android-rk818-lvds.dtb \
 	rk3288-evb-android-rk818-mipi.dtb \
 	rk3288-evb-android-rk818-mipi-edp.dtb \