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.com


Signed-off-by: Joel Stanley <joel@jms.id.au>