scsi: elx: efct: Remove redundant memset() statement

As memset() of bmbx is immediately followed by a memcpy() where bmbx is the
destination, the memset() is redundant.

Link: https://lore.kernel.org/r/20220505143703.45441-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>