ARM: dts: aspeed: rainier: Add eeprom on bus 12

The devicetree was missing an eeprom.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210915214738.34382-4-eajames@linux.ibm.comSigned-off-by: Joel Stanley <joel@jms.id.au>

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

@@ -2053,6 +2053,11 @@ eeprom@51 {
 
 &i2c12 {
 	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+	};
 };
 
 &i2c13 {