scsi: lpfc: Reinitialize internal VMID data structures after FLOGI completion

After enabling VMID, an issue LIP test was erasing fabric switch VMID
information.

Introduce a lpfc_reinit_vmid() routine, which reinitializes all VMID data
structures upon FLOGI completion in fabric topology.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>