usb/renesas_usbhs: free uep on removal

Can't find evidence that this is actually done.

Cc: Kuninori Morimoto <[e-mail]>
Signed-off-by: Sebastian Andrzej Siewior <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/renesas_usbhs/mod_gadget.c

···
 {
 	struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
 
+	kfree(gpriv->uep);
 	kfree(gpriv);
 }