libata: Trim trailing whitespace

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 5309c31..d807098 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1009,7 +1009,7 @@
 	sense_buf[0] = 0x70;
 	sense_buf[2] = qc->result_tf.feature >> 4;
 
-	/* some devices time out if garbage left in tf */ 
+	/* some devices time out if garbage left in tf */
 	ata_tf_init(dev, &tf);
 
 	memset(cdb, 0, ATAPI_CDB_LEN);