scsi: aacraid: Fix missing break in switch statement

Add missing break statement and fix identation issue.

This bug was found thanks to the ongoing efforts to enable
-Wimplicit-fallthrough.

Fixes: 9cb62fa2

 ("aacraid: Log firmware AIF messages")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>