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.c b/drivers/usb/renesas_usbhs/mod.c
index ab12030..0340fb9 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -93,8 +93,9 @@
 	return ret;
 }
 
-int usbhs_mod_is_host(struct usbhs_priv *priv, struct usbhs_mod *mod)
+int usbhs_mod_is_host(struct usbhs_priv *priv)
 {
+	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 	struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
 
 	if (!mod)