libata: trim trailing whitespace.
Also, fixup a tabs-to-spaces block of code in ata_piix.
diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c
index e418b89..b250ae0 100644
--- a/drivers/scsi/sata_sis.c
+++ b/drivers/scsi/sata_sis.c
@@ -234,7 +234,7 @@
pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
probe_ent->host_flags |= SIS_FLAG_CFGSCR;
-
+
/* if hardware thinks SCRs are in IO space, but there are
* no IO resources assigned, change to PCI cfg space.
*/
