ext4: correct endianness conversion in __xattr_check_inode()

It should be cpu_to_le32(), not le32_to_cpu().  No change in behavior.

Found with sparse, and this was the only endianness warning in fs/ext4/.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Reviewed-by: NJan Kara <jack@suse.cz>

fs/ext4/xattr.c

@@ -241,7 +241,7 @@ __xattr_check_inode(struct inode *inode, struct ext4_xattr_ibody_header *header,
 	int error = -EFSCORRUPTED;
 
 	if (((void *) header >= end) ||
-	    (header->h_magic != le32_to_cpu(EXT4_XATTR_MAGIC)))
+	    (header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)))
 		goto errout;
 	error = ext4_xattr_check_names(entry, end, entry);
 errout: