arm64: dts: rockchip: rk3588s-tablet-rk806-single: adjust gpu upthreshold/downdifferential

adjust upthreshold/downdifferential for gpu to save power

Signed-off-by: Weixin Zhou <[email protected]>
Change-Id: I992f6dd55f86f27c86d9472a3519f24e6f9cb1b6

Author: Weixin Zhou

arch/arm64/boot/dts/rockchip/rk3588s-tablet-rk806-single.dtsi

@@ -1076,6 +1076,8 @@
 &gpu {
 	mali-supply = <&vdd_gpu_s0>;
 	mem-supply = <&vdd_gpu_mem_s0>;
+	upthreshold = <60>;
+	downdifferential = <30>;
 	status = "okay";
 };