ARM: dts: Add RTC entry for dm816x

Add RTC entry for dm816x.

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/dm816x.dtsi b/arch/arm/boot/dts/dm816x.dtsi
index 30fa5b6..d9309a0 100644
--- a/arch/arm/boot/dts/dm816x.dtsi
+++ b/arch/arm/boot/dts/dm816x.dtsi
@@ -216,6 +216,13 @@
 			reg = <0x48200000 0x1000>;
 		};
 
+		rtc: rtc@480c0000 {
+			compatible = "ti,am3352-rtc", "ti,da830-rtc";
+			reg = <0x480c0000 0x1000>;
+			interrupts = <75 76>;
+			ti,hwmods = "rtc";
+		};
+
 		mailbox: mailbox@480c8000 {
 			compatible = "ti,omap4-mailbox";
 			reg = <0x480c8000 0x2000>;