arm64: dts: ti: k3-am642-evm: Enable "SYNC_OUT0" output

The IEP0 SYNC_OUT0 pins are used for PPS out on AM64 EVM.
Configure its PINMUX here.
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20240614100829.3919008-1-danishanwar@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am642-evm.dts

@@ -466,6 +466,12 @@ AM64X_IOPAD(0x00f8, PIN_INPUT, 2) /* (V9) PRG1_PRU0_GPO16.PRG1_RGMII1_TXC */
 			AM64X_IOPAD(0x00f4, PIN_INPUT, 2) /* (Y9) PRG1_PRU0_GPO15.PRG1_RGMII1_TX_CTL */
 		>;
 	};
+
+	icssg1_iep0_pins_default: icssg1-iep0-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x0104, PIN_OUTPUT, 2) /* (W7) PRG1_PRU0_GPO19.PRG1_IEP0_EDC_SYNC_OUT0 */
+		>;
+	};
 };
 
 &main_uart0 {
@@ -821,3 +827,8 @@ icssg1_phy1: ethernet-phy@f {
 &gpmc0 {
 	ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
 };
+
+&icssg1_iep0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&icssg1_iep0_pins_default>;
+};