ath79: convert Atheros DB120 WiFis to nvmem-cells

Pull the calibration data from the nvmem subsystem. This allows us to
move userspace caldata extraction into the device-tree definition.

Signed-off-by: Nick Hainke <vincent@systemli.org>
(merged art-node back into partition-node)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/ath79/dts/ar9344_atheros_db120.dts

@@ -135,10 +135,30 @@
 				reg = <0x7e0000 0x010000>;
 			};
 
-			art: partition@7f0000 {
+			partition@7f0000 {
 				label = "art";
 				reg = <0x7f0000 0x010000>;
 				read-only;
+
+				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>;
+				};
+
+				calibration_art_1000: calibration@1000 {
+					reg = <0x1000 0x440>;
+				};
+
+				calibration_art_5000: calibration@5000 {
+					reg = <0x5000 0x440>;
+				};
 			};
 		};
 	};
@@ -204,7 +224,8 @@
 	ath9k: wifi@0,0 {
 		compatible = "pci168c,0030";
 		reg = <0x0000 0 0 0 0>;
-		qca,no-eeprom;
+		nvmem-cells = <&calibration_art_5000>;
+		nvmem-cell-names = "calibration";
 		ieee80211-freq-limit = <4900000 5990000>;
 		#gpio-cells = <2>;
 		gpio-controller;
@@ -214,7 +235,8 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
+	nvmem-cells = <&calibration_art_1000>;
+	nvmem-cell-names = "calibration";
 };
 
 &usb {
@@ -224,17 +246,3 @@
 &usb_phy {
 	status = "okay";
 };
-
-&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>;
-	};
-};

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom

@@ -83,7 +83,6 @@ case "$FIRMWARE" in
 	;;
 "ath9k-eeprom-pci-0000:00:00.0.bin")
 	case $board in
-	atheros,db120|\
 	engenius,eap600|\
 	engenius,ecb600|\
 	mercury,mw4530r-v1|\