mediatek: switch to fitblk for JDCloud RE-CP-03

Use the new fitblk driver.

Tested-By: Yangyu Chen <cyy@cyyself.name>
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

target/linux/mediatek/dts/mt7986a-jdcloud-re-cp-03.dts

@@ -23,7 +23,9 @@
 	};
 
 	chosen {
+		bootargs-override = "root=/dev/fit0 rootwait";
 		stdout-path = "serial0:115200n8";
+		rootdisk = <&emmc_rootdisk>;
 	};
 
 	memory@40000000 {
@@ -157,6 +159,20 @@
 	vmmc-supply = <&reg_3p3v>;
 	vqmmc-supply = <&reg_1p8v>;
 	status = "okay";
+
+	card@0 {
+		compatible = "mmc-card";
+		reg = <0>;
+
+		block {
+			compatible = "block-device";
+			partitions {
+				emmc_rootdisk: block-partition-production {
+					partname = "production";
+				};
+			};
+		};
+	};
 };
 
 &pio {

target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh

@@ -83,6 +83,7 @@ platform_do_upgrade() {
 	bananapi,bpi-r3|\
 	bananapi,bpi-r3-mini|\
 	bananapi,bpi-r4|\
+	jdcloud,re-cp-03|\
 	tplink,tl-xdr4288|\
 	tplink,tl-xdr6086|\
 	tplink,tl-xdr6088|\
@@ -140,10 +141,6 @@ platform_do_upgrade() {
 		CI_KERNPART="fit"
 		nand_do_upgrade "$1"
 		;;
-	jdcloud,re-cp-03)
-		CI_KERNPART="production"
-		emmc_do_upgrade "$1"
-		;;
 	mercusys,mr90x-v1)
 		CI_UBIPART="ubi0"
 		nand_do_upgrade "$1"