arm64: dts: ti: k3-am64-main: add timesync router node

The Time Sync Event Router (TIMESYNC_INTRTR0) implements a set of
multiplexers to provide selection of active CPTS time sync events for
routing to CPTS capable modules.

This patch adds DT node TIMESYNC_INTRTR0 using "pinctrl-single" bindings.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20211202173114.9936-1-christian.gmeiner@gmail.com

arch/arm64/boot/dts/ti/k3-am64-main.dtsi

@@ -564,6 +564,14 @@ cpts@39000000 {
 		ti,cpts-ext-ts-inputs = <8>;
 	};
 
+	timesync_router: pinctrl@a40000 {
+		compatible = "pinctrl-single";
+		reg = <0x0 0xa40000 0x0 0x800>;
+		#pinctrl-cells = <1>;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0x000107ff>;
+	};
+
 	usbss0: cdns-usb@f900000{
 		compatible = "ti,am64-usb";
 		reg = <0x00 0xf900000 0x00 0x100>;