scsi: mpt3sas: Fix buffer overflow in mpt3sas_send_mctp_passthru_req()

scsi: mpt3sas: Fix buffer overflow in mpt3sas_send_mctp_passthru_req()

The "sz" argument in mpt3sas_check_cmd_timeout() is the number of u32, not
the number of bytes.  We dump that many u32 values to dmesg.  Passing the
number of bytes will lead to a read overflow.  Divide by 4 to get the
correct value.

Fixes: c72be4b5bb7c ("scsi: mpt3sas: Add support for MCTP Passthrough commands")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/02b0d4ff-961c-49ae-921a-5cc469edf93c@stanley.mountain
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>