scsi: arcmsr: fix indentation issues

There are a few statements that are indented incorrectly, fix these.

Link: https://lore.kernel.org/r/20191114180007.325856-1-colin.king@canonical.comSigned-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>