scsi: lpfc: Fix SLI3 drivers attempting NVME ELS commands.

In a server with an 8G adapter and a 32G adapter, running NVME and FCP,
the server would crash with the following stack.

RIP: 0010: ... lpfc_nvme_register_port+0x38/0x420 [lpfc]
 lpfc_nlp_state_cleanup+0x154/0x4f0 [lpfc]
 lpfc_nlp_set_state+0x9d/0x1a0 [lpfc]
 lpfc_cmpl_prli_prli_issue+0x35f/0x440 [lpfc]
 lpfc_disc_state_machine+0x78/0x1c0 [lpfc]
 lpfc_cmpl_els_prli+0x17c/0x1f0 [lpfc]
 lpfc_sli_sp_handle_rspiocb+0x39b/0x6b0 [lpfc]
 lpfc_sli_handle_slow_ring_event_s3+0x134/0x2d0 [lpfc]
 lpfc_work_done+0x8ac/0x13b0 [lpfc]
 lpfc_do_work+0xf1/0x1b0 [lpfc]

Crash, on the 8G adapter, is due to a vport which does not have a nvme
local port structure. It's not supposed to have one. NVME is not
supported on the 8G adapter, so the NVME PRLI, which started this flow
shouldn't have been sent in the first place.

Correct discovery engine to recognize when on an SLI3 rport, which
doesn't support SLI3, if the rport supports only NVME, don't send a NVME
PRLI. Instead, as no FC4 will be used, a LOGO is sent.  If rport is FCP
and NVME, only execute the SCSI PRLI.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>