Remove the device name, it is added by the dev_...() routines.

Drop the error code as well. It will be shown by the driver core when
the probe operation failed.
Reviewed-by: NPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: NMartin Kaiser <martin@kaiser.cx>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>