ext4: fix incorrect indentation of if statement

The indentation is incorrect and spaces need replacing with a tab
on the if statement.

Cleans up smatch warning:
fs/ext4/namei.c:3220 ext4_link() warn: inconsistent indenting
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Reviewed-by: NJan Kara <jack@suse.cz>

fs/ext4/namei.c

@@ -3221,9 +3221,9 @@ static int ext4_link(struct dentry *old_dentry,
 	if (err)
 		return err;
 
-       if ((ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) &&
-	   (!projid_eq(EXT4_I(dir)->i_projid,
-		       EXT4_I(old_dentry->d_inode)->i_projid)))
+	if ((ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) &&
+	    (!projid_eq(EXT4_I(dir)->i_projid,
+			EXT4_I(old_dentry->d_inode)->i_projid)))
 		return -EXDEV;
 
 	err = dquot_initialize(dir);