ARM: dts: microchip: sama7d65_curiosity: add EEPROM

ARM: dts: microchip: sama7d65_curiosity: add EEPROM

If the MAC address is not fetched and loaded by U-boot then Linux will
have to load the address. The EEPROM and nvmem-layout to describe
EUI48 MAC address regions.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Link: https://lore.kernel.org/r/96ee6832d9b55acfae8d3560f625798025dfd89c.1743523114.git.Ryan.Wanner@microchip.com
[claudiu.beznea: added nvmem properties in gmac0 node before the status
 one]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>