ARM: dts: am335x: Set wakeup-source for UART0

On am335x evm[1], UART0(UART1-HW) has a wakeup capability.
Set wakeup-source, which will be used in the omap serial driver to enable
the device wakeup capability.

[1] https://www.ti.com/tool/TMDXEVM3358
[2] AM335x TRM - https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf

Signed-off-by: Sukrut Bellary <[email protected]>
Tested-by: Judith Mendez <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Kevin Hilman <[email protected]>

Author: Sukrut Bellary

arch/arm/boot/dts/ti/omap/am335x-evm.dts

@@ -388,7 +388,7 @@
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;
-
+	wakeup-source;
 	status = "okay";
 };