squashfs: add xattr support configure option

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index b6425ac..88b4f86 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -43,6 +43,7 @@
 #include "squashfs_fs_i.h"
 #include "squashfs.h"
 #include "decompressor.h"
+#include "xattr.h"
 
 static struct file_system_type squashfs_fs_type;
 static const struct super_operations squashfs_super_ops;
@@ -272,7 +273,8 @@
 	if (IS_ERR(msblk->xattr_id_table)) {
 		err = PTR_ERR(msblk->xattr_id_table);
 		msblk->xattr_id_table = NULL;
-		goto failed_mount;
+		if (err != -ENOTSUPP)
+			goto failed_mount;
 	}
 allocate_root:
 	root = new_inode(sb);