fix comments with new drivers organization

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
diff --git a/drivers/usb/usbdcore_mpc8xx.c b/drivers/usb/usbdcore_mpc8xx.c
index d4c4096..122793c 100644
--- a/drivers/usb/usbdcore_mpc8xx.c
+++ b/drivers/usb/usbdcore_mpc8xx.c
@@ -3,7 +3,8 @@
  * bodonoghue@CodeHermit.ie
  *
  * References
- * DasUBoot/drivers/usbdcore_omap1510.c, for design and implementation ideas.
+ * DasUBoot/drivers/usb/usbdcore_omap1510.c, for design and implementation
+ * ideas.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by