arm64: dts: rockchip: enable gamma control on RK3399

Define the memory region on RK3399 VOPs containing the gamma LUT at
base+0x2000.
Signed-off-by: Hugh Cole-Baker <sigmaris@gmail.com>
Tested-by: Linus Heckemann <git@sphalerite.org>
Link: https://lore.kernel.org/r/20211019215843.42718-4-sigmaris@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -1702,7 +1702,7 @@ i2s2: i2s@ff8a0000 {
 
 	vopl: vop@ff8f0000 {
 		compatible = "rockchip,rk3399-vop-lit";
-		reg = <0x0 0xff8f0000 0x0 0x3efc>;
+		reg = <0x0 0xff8f0000 0x0 0x2000>, <0x0 0xff8f2000 0x0 0x400>;
 		interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH 0>;
 		assigned-clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
 		assigned-clock-rates = <400000000>, <100000000>;
@@ -1758,7 +1758,7 @@ vopl_mmu: iommu@ff8f3f00 {
 
 	vopb: vop@ff900000 {
 		compatible = "rockchip,rk3399-vop-big";
-		reg = <0x0 0xff900000 0x0 0x3efc>;
+		reg = <0x0 0xff900000 0x0 0x2000>, <0x0 0xff902000 0x0 0x1000>;
 		interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH 0>;
 		assigned-clocks = <&cru ACLK_VOP0>, <&cru HCLK_VOP0>;
 		assigned-clock-rates = <400000000>, <100000000>;