[SCSI] lpfc : scsi command accessor fix for 8.2.2

It was pointed out by Boaz Harrosh <[e-mail]> that our
8.2.2 lpfc patches revert a change to using SCSI command accessor
functions.

This patch, to be applied on top of the 8.2.2. patches, updates the
driver for the accessor functions.

Signed-off-by: James Smart <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/lpfc/lpfc_scsi.c

···
 					 "0717 FCP command x%x residual "
 					 "underrun converted to error "
 					 "Data: x%x x%x x%x\n",
-					 cmnd->cmnd[0], cmnd->request_bufflen,
+					 cmnd->cmnd[0], scsi_bufflen(cmnd),
 					 scsi_get_resid(cmnd), cmnd->underflow);
 			host_status = DID_ERROR;
 		}