modinfo for lpfc_nvme_enable_fb is incorrect. FirstBurst on lpfc target is
not fully supported.

Update the attribute description
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <jsmart2021@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>