f2fs: add missing quota_initialize

This patch adds to call quota_intialize in f2fs_set_acl, f2fs_unlink,
and f2fs_rename.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/xattr.c

@@ -678,6 +678,10 @@ int f2fs_setxattr(struct inode *inode, int index, const char *name,
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	int err;
 
+	err = dquot_initialize(inode);
+	if (err)
+		return err;
+
 	/* this case is only from init_inode_metadata */
 	if (ipage)
 		return __f2fs_setxattr(inode, index, name, value,