dmaengine: idxd: add driver name

Add name field in idxd_device_driver so we don't have to touch the
'struct device_driver' during declaration.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162637459517.744545.7572915135318813722.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>