ath79: mtd-cal-data removals

Replacement can be done with nvmem.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

target/linux/ath79/dts/qca9531_8dev_carambola3.dts

@@ -72,7 +72,7 @@
 				reg = <0x040000 0x040000>;
 			};
 
-			art: partition@80000 {
+			partition@80000 {
 				label = "art";
 				reg = <0x080000 0x040000>;
 				read-only;
@@ -89,6 +89,10 @@
 					macaddr_art_6: macaddr@6 {
 						reg = <0x6 0x6>;
 					};
+
+					cal_art_1000: calibration@1000 {
+						reg = <0x1000 0x440>;
+					};
 				};
 			};
 
@@ -129,5 +133,6 @@
 &wmac {
 	status = "okay";
 
-	mtd-cal-data = <&art 0x1000>;
+	nvmem-cells = <&cal_art_1000>;
+	nvmem-cell-names = "calibration";
 };