scsi: libsas: Correctly indent statements in sas_to_ata_err()

checkpatch reported an error in sas_to_ata_err(). switch and case
statements are incorrectly indented.

Link: https://lore.kernel.org/r/1616675396-6108-2-git-send-email-luojiaxing@huawei.com


Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>