scsi: lpfc: Clear fabric topology flag before initiating a new FLOGI

Previous topologies may no longer be in fabric mode, so clear FC_FABRIC in
fc_flag for every new FLOGI.

Link: https://lore.kernel.org/r/20220412222008.126521-8-jsmart2021@gmail.com


Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>