Incorrect error returned on setting file compressed on SMB2

When the server (for an SMB2 or SMB3 mount) doesn't support
an ioctl (such as setting the compressed flag
on a file) we were incorrectly returning EIO instead
of EOPNOTSUPP, this is confusing e.g. doing chattr +c to a file
on a non-btrfs Samba partition, now the error returned is more
intuitive to the user.  Also fixes error mapping on setting
hardlink to servers which don't support that.

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>

fs/cifs/smb2maperror.c

@@ -298,7 +298,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
 	{STATUS_INVALID_PARAMETER, -EINVAL, "STATUS_INVALID_PARAMETER"},
 	{STATUS_NO_SUCH_DEVICE, -ENODEV, "STATUS_NO_SUCH_DEVICE"},
 	{STATUS_NO_SUCH_FILE, -ENOENT, "STATUS_NO_SUCH_FILE"},
-	{STATUS_INVALID_DEVICE_REQUEST, -EIO, "STATUS_INVALID_DEVICE_REQUEST"},
+	{STATUS_INVALID_DEVICE_REQUEST, -EOPNOTSUPP, "STATUS_INVALID_DEVICE_REQUEST"},
 	{STATUS_END_OF_FILE, -ENODATA, "STATUS_END_OF_FILE"},
 	{STATUS_WRONG_VOLUME, -EIO, "STATUS_WRONG_VOLUME"},
 	{STATUS_NO_MEDIA_IN_DEVICE, -EIO, "STATUS_NO_MEDIA_IN_DEVICE"},