scsi: correct return values for .eh_abort_handler implementations

The .eh_abort_handler needs to return SUCCESS, FAILED, or
FAST_IO_FAIL. So fixup all callers to adhere to this requirement.

Reviewed-by: Robert Elliott <elliott@hp.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/aha1740.c b/drivers/scsi/aha1740.c
index 5f31017..31ace4b 100644
--- a/drivers/scsi/aha1740.c
+++ b/drivers/scsi/aha1740.c
@@ -531,7 +531,7 @@
  * quiet as possible...
  */
 
-	return 0;
+	return SUCCESS;
 }
 
 static struct scsi_host_template aha1740_template = {