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 <[email protected]>
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 <[email protected]>

Author: ryan-wanner

arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts

@@ -78,6 +78,8 @@
 		     &pinctrl_gmac0_txck_default
 		     &pinctrl_gmac0_phy_irq>;
 	phy-mode = "rgmii-id";
+	nvmem-cells = <&eeprom0_eui48>;
+	nvmem-cell-names = "mac-address";
 	status = "okay";
 
 	ethernet-phy@7 {
@@ -251,6 +253,24 @@
 			};
 		};
 	};
+
+	eeprom0: eeprom@51 {
+		compatible = "microchip,24aa025e48";
+		reg = <0x51>;
+		size = <256>;
+		pagesize = <16>;
+		vcc-supply = <&vdd_3v3>;
+
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			eeprom0_eui48: eui48@fa {
+				reg = <0xfa 0x6>;
+			};
+		};
+	};
 };
 
 &main_xtal {