Fix the following coccicheck warnings:

./drivers/scsi/dc395x.c:2921:28-29: WARNING: sum of probable bitmasks,
consider |.

Link: https://lore.kernel.org/r/1615261153-32647-1-git-send-email-jiapeng.chong@linux.alibaba.comReported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>