s390/lcs: remove trailing space at end of dev_err message

There is a trailing white space at the end of a dev_err
message that does nothing useful - remove it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>