arm64: dts: rockchip: set display regulators to always-on on BPI-R2-Pro

The gpu power supply needs to stay always on until the issues with power-
domains not being regulator aware is resolved. Otherwise we run into
issues where the gpu-regulator gets shut down and we start getting mmu
faults.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20220606170803.478082-2-linux@fw-web.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts

@@ -215,6 +215,7 @@
 
 			vdd_gpu: DCDC_REG2 {
 				regulator-name = "vdd_gpu";
+				regulator-always-on;
 				regulator-init-microvolt = <900000>;
 				regulator-initial-mode = <0x2>;
 				regulator-min-microvolt = <500000>;
@@ -264,6 +265,7 @@
 
 			vdda0v9_image: LDO_REG1 {
 				regulator-name = "vdda0v9_image";
+				regulator-always-on;
 				regulator-min-microvolt = <900000>;
 				regulator-max-microvolt = <900000>;
 
@@ -359,6 +361,7 @@
 
 			vcca1v8_image: LDO_REG9 {
 				regulator-name = "vcca1v8_image";
+				regulator-always-on;
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;