arm64: dts: ti: k3-j721e-main.dtsi: Add USB to SERDES MUX

The USB controllers can be connected to one of the 2 SERDESes
using a MUX. Add a MUX controller node fot that.

Signed-off-by: Roger Quadros <[email protected]>
Signed-off-by: Sekhar Nori <[email protected]>
Signed-off-by: Tero Kristo <[email protected]>

Author: Roger Quadros

arch/arm64/boot/dts/ti/k3-j721e-main.dtsi

@@ -44,6 +44,13 @@
 				      <MUX_IDLE_AS_IS>, <SERDES3_LANE1_USB3_0>,
 				      <SERDES4_LANE0_EDP_LANE0>, <SERDES4_LANE1_EDP_LANE1>, <SERDES4_LANE2_EDP_LANE2>, <SERDES4_LANE3_EDP_LANE3>;
 		};
+
+		usb_serdes_mux: mux-controller@4000 {
+			compatible = "mmio-mux";
+			#mux-control-cells = <1>;
+			mux-reg-masks = <0x4000 0x8000000>, /* USB0 to SERDES0/3 mux */
+					<0x4010 0x8000000>; /* USB1 to SERDES1/2 mux */
+	    };
 	};
 
 	gic500: interrupt-controller@1800000 {