arm64: dts: rockchip: Drop regulator-compatible property on rk3399

The regulator-compatible property has never existed in the
regulator/fcs,fan53555.yaml binding, so drop it.

This fixes the following DTB validation warnings:

  Unevaluated properties are not allowed
  ('regulator-compatible' was unexpected)

Signed-off-by: Diederik de Haas <didi.debian@cknow.org>
Link: https://lore.kernel.org/r/20250709132323.128757-11-didi.debian@cknow.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: diederikdehaas

arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts

@@ -211,7 +211,6 @@
 	vdd_cpu_b: syr827@40 {
 		compatible = "silergy,syr827";
 		reg = <0x40>;
-		regulator-compatible = "fan53555-reg";
 		pinctrl-0 = <&vsel1_pin>;
 		regulator-name = "vdd_cpu_b";
 		regulator-min-microvolt = <712500>;
@@ -229,7 +228,6 @@
 	vdd_gpu: syr828@41 {
 		compatible = "silergy,syr828";
 		reg = <0x41>;
-		regulator-compatible = "fan53555-reg";
 		pinctrl-0 = <&vsel2_pin>;
 		regulator-name = "vdd_gpu";
 		regulator-min-microvolt = <712500>;

arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts

@@ -421,7 +421,6 @@
 		compatible = "silergy,syr827";
 		reg = <0x40>;
 		fcs,suspend-voltage-selector = <1>;
-		regulator-compatible = "fan53555-reg";
 		pinctrl-0 = <&vsel1_gpio>;
 		vsel-gpios = <&gpio1 RK_PC1 GPIO_ACTIVE_HIGH>;
 		regulator-name = "vdd_cpu_b";
@@ -440,7 +439,6 @@
 		compatible = "silergy,syr828";
 		reg = <0x41>;
 		fcs,suspend-voltage-selector = <1>;
-		regulator-compatible = "fan53555-reg";
 		pinctrl-0 = <&vsel2_gpio>;
 		vsel-gpios = <&gpio1 RK_PB6 GPIO_ACTIVE_HIGH>;
 		regulator-name = "vdd_gpu";