ramips: mt7621: convert NETGEAR devices EEPROM to NVMEM format

-+------------------------------+-
 |    Model   |       NIC       |
-+------------------------------+-
 | chj series | MT7603 + MT7615 |
-+------------------------------+-
 | bzv series |    MT7615 *2    |
-+------------------------------+-

Signed-off-by: Shiji Yang <[email protected]>

target/linux/ramips/dts/mt7621_netgear_sercomm_bzv.dtsi

@@ -147,7 +147,8 @@
 	wifi@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x0>;
+		nvmem-cells = <&eeprom_factory_0>;
+		nvmem-cell-names = "eeprom";
 		ieee80211-freq-limit = <2400000 2500000>;
 	};
 };
@@ -156,7 +157,8 @@
 	wifi@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x8000>;
+		nvmem-cells = <&eeprom_factory_8000>;
+		nvmem-cell-names = "eeprom";
 		ieee80211-freq-limit = <5000000 6000000>;
 	};
 };
@@ -348,6 +350,14 @@
 				#address-cells = <1>;
 				#size-cells = <1>;
 
+				eeprom_factory_0: eeprom@0 {
+					reg = <0x0 0x4da8>;
+				};
+
+				eeprom_factory_8000: eeprom@8000 {
+					reg = <0x8000 0x4da8>;
+				};
+
 				macaddr_factory_4: macaddr@4 {
 					compatible = "mac-base";
 					reg = <0x4 0x6>;

target/linux/ramips/dts/mt7621_netgear_sercomm_chj.dtsi

@@ -81,7 +81,8 @@
 	wifi@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x8000>;
+		nvmem-cells = <&eeprom_factory_8000>;
+		nvmem-cell-names = "eeprom";
 		ieee80211-freq-limit = <5000000 6000000>;
 	};
 };
@@ -90,7 +91,8 @@
 	wifi@0,0 {
 		compatible = "mediatek,mt76";
 		reg = <0x0 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x0>;
+		nvmem-cells = <&eeprom_factory_0>;
+		nvmem-cell-names = "eeprom";
 		ieee80211-freq-limit = <2400000 2500000>;
 	};
 };
@@ -275,6 +277,14 @@
 				#address-cells = <1>;
 				#size-cells = <1>;
 
+				eeprom_factory_0: eeprom@0 {
+					reg = <0x0 0x400>;
+				};
+
+				eeprom_factory_8000: eeprom@8000 {
+					reg = <0x8000 0x4da8>;
+				};
+
 				macaddr_factory_4: macaddr@4 {
 					compatible = "mac-base";
 					reg = <0x4 0x6>;