scsi: megaraid_sas: Remove redundant memset() statement

As memset() of scmd->sense_buffer is immediately followed by a memcpy()
where scmd->sense_buffer is the destination. The memset() is redundant.

Link: https://lore.kernel.org/r/20220505143214.44908-1-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>