The driver is currently reporting a non-zero nvme sg_seg_cnt value of 256
when nvme is disabled. It should be zero.

Fix by ensuring the value is cleared.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>