[libata] Trim trailing whitespace.

No code changes.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index fd694b6..1879e0c 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -309,7 +309,7 @@
 		case 0x10:
 			ppi[1] = &sis_info133;
 			break;
-			
+
 		case 0x30:
 			ppi[0] = &sis_info133;
 			break;