scsi: qedi: Use snprintf instead of sprintf

Use snprintf to limit max number of bytes to the buffer.

Link: https://lore.kernel.org/r/20200908095657.26821-6-mrangankar@marvell.com


Signed-off-by: Manish Rangankar <mrangankar@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>