[PATCH] lightnvm: add missing \n to end of dev_err message

[J Freyensee]

On Sun, 2016-09-25 at 14:56 -0700, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> Trival fix, dev_err message is missing a \n, so add it.
> 
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> 
Reviewed-by: Jay Freyensee <james_p_freyensee at linux.intel.com>