arm64: dts: rockchip: fix LDO_REG4 / LDO_REG7 confusion on rk3368-lion

LDO_REG7 is used for generating VCC_18.
LDO_REG4 is not connected to anything - delete it.
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20210922230429.2162535-1-heiko@sntech.de

arch/arm64/boot/dts/rockchip/rk3368-lion.dtsi

@@ -144,7 +144,7 @@ &emmc {
 	mmc-hs200-1_8v;
 	non-removable;
 	vmmc-supply = <&vcc33_io>;
-	vqmmc-supply = <&vcc18_io>;
+	vqmmc-supply = <&vcc_18>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&emmc_clk>, <&emmc_cmd>, <&emmc_bus8>;
 	status = "okay";
@@ -238,13 +238,6 @@ vdd10_pll: LDO_REG3 {
 				regulator-boot-on;
 			};
 
-			vcc18_io: LDO_REG4 {
-				regulator-name = "vcc18_io";
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
-				regulator-boot-on;
-			};
-
 			vdd10_video: LDO_REG6 {
 				regulator-name = "vdd10_video";
 				regulator-min-microvolt = <1000000>;
@@ -253,6 +246,14 @@ vdd10_video: LDO_REG6 {
 				regulator-boot-on;
 			};
 
+			vcc_18: LDO_REG7 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-name = "vcc_18";
+			};
+
 			vcc18_video: LDO_REG8 {
 				regulator-name = "vcc18_video";
 				regulator-min-microvolt = <1800000>;