ARM: dts: gta04: add serial console wakeup irq

This enables the possibility to have more aggressive runtime pm
by providing proper wakeup irq for the serial console.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-gta04.dtsi

@@ -636,6 +636,7 @@ &uart2 {
 &uart3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
+	interrupts-extended = <&intc 74 &omap3_pmx_core OMAP3_UART3_RX>;
 };
 
 &charger {