ARM: dts: aspeed: everest: Add RTC

Add the RTC at the appropriate I2C bus and address.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210329150020.13632-20-eajames@linux.ibm.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts

@@ -708,6 +708,11 @@ ucd90320@11 {
 		reg = <0x11>;
 	};
 
+	rtc@32 {
+		compatible = "epson,rx8900";
+		reg = <0x32>;
+	};
+
 	eeprom@51 {
 		compatible = "atmel,24c64";
 		reg = <0x51>;