scsi: lpfc: Commonize VMID code location

Remove VMID code from its SCSI-specific location and move to a new file
solely for VMID code.

Link: https://lore.kernel.org/r/20220519123110.17361-3-jsmart2021@gmail.com


Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Co-developed-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>