arm64: dts: rockchip: Fix PCIe power enable pin for BigTreeTech CB2 and Pi2

Fix typo into regulator GPIO definition. With current definition, PCIe
doesn't start up. Valid definition is already used in  "pinctrl" section,
"pcie_drv" (gpio4, RK_PB1).

Fixes: bfbc663 ("arm64: dts: rockchip: Add BigTreeTech CB2 and Pi2")
Signed-off-by: Andrey Leonchikov <andreil499@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: andreili

arch/arm64/boot/dts/rockchip/rk3566-bigtreetech-cb2.dtsi

@@ -120,7 +120,7 @@
 		compatible = "regulator-fixed";
 		regulator-name = "vcc3v3_pcie";
 		enable-active-high;
-		gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_HIGH>;
+		gpios = <&gpio4 RK_PB1 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pcie_drv>;
 		regulator-always-on;