mediatek: filogic: switch to fitblk for Xiaomi Redmi AX6000

Use the new fitblk driver.

Run-tested: filogic/mt7986a-xiaomi-redmi-router-ax6000-ubootmod

Signed-off-by: Furong Xu <xfr@outlook.com>

target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000-ubootmod.dts

@@ -8,9 +8,20 @@
 	compatible = "xiaomi,redmi-router-ax6000-ubootmod", "mediatek,mt7986a";
 };
 
+&chosen {
+	rootdisk = <&ubi_rootdisk>;
+};
+
 &partitions {
 	partition@580000 {
-		label = "ubi";
+		compatible = "linux,ubi";
 		reg = <0x580000 0x7a80000>;
+		label = "ubi";
+
+		volumes {
+			ubi_rootdisk: ubi-volume-fit {
+				volname = "fit";
+			};
+		};
 	};
 };

target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi

@@ -17,7 +17,7 @@
 		led-upgrade = &led_status_rgb;
 	};
 
-	chosen {
+	chosen: chosen {
 		stdout-path = "serial0:115200n8";
 	};