ramips: sysupgrade: move nand_do_upgrade call to platform_do_upgrade

All targets with NAND support should gradually move their nand_do_upgrade
calls from platform_pre_upgrade to platform_do_upgrade.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

target/linux/ramips/base-files/lib/upgrade/platform.sh

@@ -280,7 +280,7 @@ platform_nand_pre_upgrade() {
 	esac
 }
 
-platform_pre_upgrade() {
+platform_do_upgrade() {
 	local board=$(ramips_board_name)
 
 	case "$board" in
@@ -289,13 +289,6 @@ platform_pre_upgrade() {
     	ubnt-erx)
 		nand_do_upgrade "$ARGV"
 		;;
-	esac
-}
-
-platform_do_upgrade() {
-	local board=$(ramips_board_name)
-
-	case "$board" in
 	*)
 		default_do_upgrade "$ARGV"
 		;;