arm64: dts: mediatek: mt6797: Add pinctrl support

Add pinctrl support for Mediatek MT6797 SoC.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt6797.dtsi

@@ -14,6 +14,7 @@
 #include <dt-bindings/clock/mt6797-clk.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/pinctrl/mt6797-pinfunc.h>
 
 / {
 	compatible = "mediatek,mt6797";
@@ -129,6 +130,19 @@ infrasys: infracfg_ao@10001000 {
 		#clock-cells = <1>;
 	};
 
+	pio: pinctrl@10005000 {
+		compatible = "mediatek,mt6797-pinctrl";
+		reg = <0 0x10005000 0 0x1000>,
+		      <0 0x10002000 0 0x400>,
+		      <0 0x10002400 0 0x400>,
+		      <0 0x10002800 0 0x400>,
+		      <0 0x10002C00 0 0x400>;
+		reg-names = "gpio", "iocfgl", "iocfgb",
+			    "iocfgr", "iocfgt";
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
 	scpsys: scpsys@10006000 {
 		compatible = "mediatek,mt6797-scpsys";
 		#power-domain-cells = <1>;