ath79: utilize ath9k 'nvmem-cells' on ALFA Network boards

Drop custom 'mtd-cal-data' and switch to 'nvmem-cells' based solution
for fetching radio calibration data and its MAC address.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

target/linux/ath79/dts/ar9331_alfa-network_ap121f.dtsi

@@ -96,10 +96,26 @@
 				reg = <0x030000 0x010000>;
 			};
 
-			art: partition@40000 {
+			partition@40000 {
 				label = "art";
 				reg = <0x040000 0x010000>;
 				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cal_art_1000: cal@1000 {
+					reg = <0x1000 0x440>;
+				};
+
+				macaddr_art_0: macaddr@0 {
+					reg = <0x0 0x6>;
+				};
+
+				macaddr_art_1002: macaddr@1002 {
+					reg = <0x1002 0x6>;
+				};
 			};
 
 			partition@50000 {
@@ -122,15 +138,6 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
-};
-
-&art {
-	compatible = "nvmem-cells";
-	#address-cells = <1>;
-	#size-cells = <1>;
-
-	macaddr_art_0: macaddr@0 {
-		reg = <0x0 0x6>;
-	};
+	nvmem-cells = <&cal_art_1000>, <&macaddr_art_1002>;
+	nvmem-cell-names = "calibration", "mac-address";
 };

target/linux/ath79/dts/ar9344_alfa-network_n5q.dts

@@ -131,10 +131,30 @@
 				reg = <0x060000 0x010000>;
 			};
 
-			art: partition@70000 {
+			partition@70000 {
 				label = "art";
 				reg = <0x070000 0x010000>;
 				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cal_art_1000: cal@1000 {
+					reg = <0x1000 0x440>;
+				};
+
+				macaddr_art_0: macaddr@0 {
+					reg = <0x0 0x6>;
+				};
+
+				macaddr_art_6: macaddr@6 {
+					reg = <0x6 0x6>;
+				};
+
+				macaddr_art_1002: macaddr@1002 {
+					reg = <0x1002 0x6>;
+				};
 			};
 
 			partition@80000 {
@@ -149,19 +169,6 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
-};
-
-&art {
-	compatible = "nvmem-cells";
-	#address-cells = <1>;
-	#size-cells = <1>;
-
-	macaddr_art_0: macaddr@0 {
-		reg = <0x0 0x6>;
-	};
-
-	macaddr_art_6: macaddr@6 {
-		reg = <0x6 0x6>;
-	};
+	nvmem-cells = <&cal_art_1000>, <&macaddr_art_1002>;
+	nvmem-cell-names = "calibration", "mac-address";
 };

target/linux/ath79/dts/qca9531_alfa-network_r36a.dtsi

@@ -82,7 +82,7 @@
 				reg = <0x060000 0x010000>;
 			};
 
-			art: partition@70000 {
+			partition@70000 {
 				label = "art";
 				reg = <0x070000 0x010000>;
 				read-only;
@@ -91,6 +91,10 @@
 				#address-cells = <1>;
 				#size-cells = <1>;
 
+				cal_art_1000: cal@1000 {
+					reg = <0x1000 0x440>;
+				};
+
 				macaddr_art_1002: macaddr@1002 {
 					reg = <0x1002 0x6>;
 				};
@@ -124,5 +128,6 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
+	nvmem-cells = <&cal_art_1000>, <&macaddr_art_1002>;
+	nvmem-cell-names = "calibration", "mac-address";
 };