scsi: mpt3sas: Fix junk chars displayed while printing ChipName

Terminate string after copying 16 bytes of ChipName data from Manufacturing
Page0 to prevent %s from printing junk characters.

Link: https://lore.kernel.org/r/20220511072621.30657-1-sreekanth.reddy@broadcom.com


Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>