pds_core: make pdsc_auxbus_dev_del() void

Since there really is no useful return, advertising a return value
is rather misleading.  Make pdsc_auxbus_dev_del() a void function.

Link: https://patch.msgid.link/r/20250320194412.67983-2-shannon.nelson@amd.com


Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>