SolidRun Armada 38x SOM rev 2.1 added EEPROM. Add DT node for EEPROM
description.

Cc: Dennis Gilmore <dennis@ausil.us>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>