usb: gadget: renesas_usbhs: remove unneeded parameter from usbhs_mod_is_host()

it was possible to get usbhs_mod from usbhs_priv.
this patch remove unneeded parameter.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/renesas_usbhs/mod.h b/drivers/usb/renesas_usbhs/mod.h
index 93edb1f..0e2c5b6 100644
--- a/drivers/usb/renesas_usbhs/mod.h
+++ b/drivers/usb/renesas_usbhs/mod.h
@@ -88,7 +88,7 @@
 struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id);
 struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv);
 void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *usb, int id);
-int usbhs_mod_is_host(struct usbhs_priv *priv, struct usbhs_mod *mod);
+int usbhs_mod_is_host(struct usbhs_priv *priv);
 int usbhs_mod_change(struct usbhs_priv *priv, int id);
 int usbhs_mod_probe(struct usbhs_priv *priv);
 void usbhs_mod_remove(struct usbhs_priv *priv);