[libata] trivial: trim trailing whitespace for drivers/ata/*.[ch]
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index af6141b..e75a02d 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1336,7 +1336,7 @@
 	u8 status;
 	int poll_next;
 
-	BUG_ON(ap->sff_pio_task_link == NULL); 
+	BUG_ON(ap->sff_pio_task_link == NULL);
 	/* qc can be NULL if timeout occurred */
 	qc = ata_qc_from_tag(ap, link->active_tag);
 	if (!qc) {