ARM: dts: Add RTC entry for dm814x and dra62x

Add RTC entry for dm814x and dra62x.
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dm814x.dtsi

@@ -305,6 +305,13 @@
 				reg = <0x60000 0x1000>;
 			};
 
+			rtc: rtc@c0000 {
+				compatible = "ti,am3352-rtc", "ti,da830-rtc";
+				reg = <0xc0000 0x1000>;
+				interrupts = <75 76>;
+				ti,hwmods = "rtc";
+			};
+
 			mmc2: mmc@1d8000 {
 				compatible = "ti,omap4-hsmmc";
 				ti,hwmods = "mmc2";