[libata] trim trailing whitespace

Most of these contributed by that mysterious figger known as A.C.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index e8dfd8f..11da1f5 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -270,7 +270,7 @@
  *	is powered up on boot and when we resume in case we resumed from RAM.
  *	Returns the final clock settings.
  */
- 
+
 static u8 sil680_init_chip(struct pci_dev *pdev)
 {
 	u32 class_rev	= 0;