ramips: wrap long line in platform upgrade script

SVN-Revision: 29392

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

@@ -14,7 +14,18 @@ platform_check_image() {
 	[ "$ARGC" -gt 1 ] && return 1
 
 	case "$board" in
-	bc2 | dir-300-b1 | dir-600-b1 | dir-600-b2 | fonera20n | nbg-419n | nw718 | rt-g32-b1 | v22rw-2x2 | whr-g300n | hw550-3g | mofi3500-3gn)
+	bc2 | \
+	dir-300-b1 | \
+	dir-600-b1 | \
+	dir-600-b2 | \
+	fonera20n | \
+	hw550-3g | \
+	mofi3500-3gn | \
+	nbg-419n | \
+	nw718 | \
+	rt-g32-b1 | \
+	v22rw-2x2 | \
+	whr-g300n)
 		[ "$magic" != "2705" ] && {
 			echo "Invalid image type."
 			return 1