scsi: lpfc: Fix function description comments for vmid routines

Update comment headers for functions lpfc_vmid_cmd and lpfc_vmid_poll.

Link: https://lore.kernel.org/r/20210707184351.67872-5-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>