linux-imx

libnvdimm: cleanup nvdimm_namespace_common_probe(), kill 'host'

The 'host' variable can be killed as it is always the same as the passed
in device.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>