renesas_usbhs: cleanup quoted includes

A few quoted includes start with a superfluous "./". Clean up those
quoted includes.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c
index 0871e81..82a628f 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -16,8 +16,8 @@
  */
 #include <linux/interrupt.h>
 
-#include "./common.h"
-#include "./mod.h"
+#include "common.h"
+#include "mod.h"
 
 #define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
 #define usbhs_mod_info_call(priv, func, param...)	\