cxl: add dimm_id support for __nvdimm_create()

Set the cxlds->serial as the dimm_id to be fed to __nvdimm_create(). The
security code uses that as the key description for the security key of the
memory device. The nvdimm unlock code cannot find the respective key
without the dimm_id.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166863357043.80269.4337575149671383294.stgit@djiang5-desk3.ch.intel.com
Link: https://lore.kernel.org/r/166983620459.2734609.10175456773200251184.stgit@djiang5-desk3.ch.intel.com
Link: https://lore.kernel.org/r/166993219918.1995348.10786511454826454601.stgit@dwillia2-xfh.jf.intel.com


Signed-off-by: Dan Williams <dan.j.williams@intel.com>