ARM: dts: am335x: Guardian: Enable UART port two

* Add support for uart2 port
Signed-off-by: Gireesh Hiremath <Gireesh.Hiremath@in.bosch.com>
Message-Id: <20220325100613.1494-12-Gireesh.Hiremath@in.bosch.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-guardian.dts

@@ -383,6 +383,12 @@ &uart0 {
 	status = "okay";
 };
 
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pins>;
+	status = "okay";
+};
+
 &usb0 {
 	dr_mode = "peripheral";
 };
@@ -582,6 +588,15 @@ AM33XX_IOPAD(0x974, PIN_OUTPUT_PULLDOWN | MUX_MODE0)
 		>;
 	};
 
+	uart2_pins: pinmux_uart2_pins {
+		pinctrl-single,pins = <
+			/* K18 uart2_rxd.mirx_txd */
+			AM33XX_IOPAD(0x92c, PIN_INPUT_PULLUP | MUX_MODE1)
+			/* L18 uart2_txd.mirx_rxd */
+			AM33XX_IOPAD(0x930, PIN_OUTPUT_PULLDOWN | MUX_MODE1)
+		>;
+	};
+
 	nandflash_pins: pinmux_nandflash_pins {
 		pinctrl-single,pins = <
 			/* (U7) gpmc_ad0.gpmc_ad0 */