scsi: lpfc: Revise FDMI reporting of supported port speed for trunk groups

Trunk port FDMI supported port speed shows single port supported speed
rather than the trunked port speed.

Modify supported port speed logic calculation during registration.

Link: https://lore.kernel.org/r/20220412222008.126521-17-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>