ARM: dts: OMAP4: Add mailbox node

The mailbox DT node data has been added for OMAP44xx
devices.
Signed-off-by: NSuman Anna <s-anna@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4.dtsi

@@ -649,6 +649,15 @@
 			};
 		};
 
+		mailbox: mailbox@4a0f4000 {
+			compatible = "ti,omap4-mailbox";
+			reg = <0x4a0f4000 0x200>;
+			interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+			ti,hwmods = "mailbox";
+			ti,mbox-num-users = <3>;
+			ti,mbox-num-fifos = <8>;
+		};
+
 		timer1: timer@4a318000 {
 			compatible = "ti,omap3430-timer";
 			reg = <0x4a318000 0x80>;