arm64: dts: rockchip: add Odroid Advance Go

The Odroid Advance Go is a handheld based on Rockchip's rk3326 soc
with a DSI display and some handheld controls including an analog
joystick connected to the saradc.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Link: https://lore.kernel.org/r/20200414082938.2977572-3-heiko@sntech.deSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/Makefile

@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3326-odroid-go2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-a1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb