mtd: partitions: remove sysfs files when deleting all master's partitions

When support for sysfs "offset" file was added it missed to update the
del_mtd_partitions function. It deletes partitions just like
mtd_del_partition does so both should also take care of removing sysfs
files.

This change moves sysfs_remove_files call to the shared function to fix
this issue.

Fixes: a62c24d755291 ("mtd: part: Add sysfs variable for offset of partition")
Cc: Dan Ehrenberg <dehrenberg@chromium.org>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/mtdpart.c

@@ -660,6 +660,8 @@ static int __mtd_del_partition(struct mtd_part *priv)
 {
 	int err;
 
+	sysfs_remove_files(&priv->mtd.dev.kobj, mtd_partition_attrs);
+
 	err = del_mtd_device(&priv->mtd);
 	if (err)
 		return err;
@@ -700,8 +702,6 @@ int mtd_del_partition(struct mtd_info *master, int partno)
 	list_for_each_entry_safe(slave, next, &mtd_partitions, list)
 		if ((slave->master == master) &&
 		    (slave->mtd.index == partno)) {
-			sysfs_remove_files(&slave->mtd.dev.kobj,
-					   mtd_partition_attrs);
 			ret = __mtd_del_partition(slave);
 			break;
 		}