usb: renesas_usbhs: revise the irq_vbus comments

Since the irq_vbus comments doesn't match with the current
implementation, this patch revises it. This patch also changes
new lines to reduce the source code lines.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/renesas_usbhs/mod.h

@@ -3,6 +3,7 @@
  * Renesas USB driver
  *
  * Copyright (C) 2011 Renesas Solutions Corp.
+ * Copyright (C) 2019 Renesas Electronics Corporation
  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
  */
 #ifndef RENESAS_USB_MOD_H
@@ -84,12 +85,11 @@ struct usbhs_mod_info {
 	/*
 	 * INTSTS0 :: VBINT
 	 *
-	 * This function will be used as autonomy mode
-	 * when platform cannot call notify_hotplug.
+	 * This function will be used as autonomy mode (runtime_pwctrl == 0)
+	 * when the platform doesn't have own get_vbus function.
 	 *
-	 * This callback cannot be member of "struct usbhs_mod"
-	 * because it will be used even though
-	 * host/gadget has not been selected.
+	 * This callback cannot be member of "struct usbhs_mod" because it
+	 * will be used even though host/gadget has not been selected.
 	 */
 	int (*irq_vbus)(struct usbhs_priv *priv,
 			struct usbhs_irq_state *irq_state);