scsi: lpfc: make several unions static, fix non-ANSI prototype

scsi: lpfc: make several unions static, fix non-ANSI prototype

There are several unions that are local to the source and do not need to
be in global scope, so make them static. Also add in a missing void
parameter to functions lpfc_nvme_cmd_template and
lpfc_nvmet_cmd_template to clean up non-ANSI warning.

Cleans up sparse warnings:
drivers/scsi/lpfc/lpfc_nvme.c:68:19: warning: symbol
'lpfc_iread_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvme.c:69:19: warning: symbol
'lpfc_iwrite_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvme.c:70:19: warning: symbol
'lpfc_icmnd_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvme.c:74:24: warning: non-ANSI function
'lpfc_tsend_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvmet.c:78:19: warning: symbol
'lpfc_treceive_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvmet.c:79:19: warning: symbol
'lpfc_trsp_cmd_template' was not declared. Should it be static?
drivers/scsi/lpfc/lpfc_nvmet.c:83:25: warning: non-ANSI function
declaration of function 'lpfc_nvmet_cmd_template'

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>