qualcommax: ipq807x: Remove OEM UBI volume before upgrade for Linksys MX devices

Use 'remove_oem_ubi_volume' function to remove OEM UBI volume before upgrade.
This allows to upgrade even if we have OEM firmware on the second partition.
Applies to Linksys MX4200/MX4300/MX5300/MX8500.

Signed-off-by: Paweł Owoc <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/14720
Signed-off-by: Robert Marko <[email protected]>

target/linux/qualcommax/ipq807x/base-files/lib/upgrade/platform.sh

@@ -212,9 +212,13 @@ platform_do_upgrade() {
 		;;
 	linksys,mx4200v1|\
 	linksys,mx4200v2|\
-	linksys,mx4300|\
+	linksys,mx4300)
+		remove_oem_ubi_volume squashfs
+		linksys_mx_do_upgrade "$1"
+		;;
 	linksys,mx5300|\
 	linksys,mx8500)
+		remove_oem_ubi_volume ubifs
 		linksys_mx_do_upgrade "$1"
 		;;
 	prpl,haze|\