usb: renesas_usbhs: add usbhsf_fifo

renesas_usbhs has CFIFO/D0FIFO/D1FIFO.
But current renesas_usbhs is using CFIFO (for PIO) only for now.
The fifo selection method is needed for DMAEngine support.
This is a preparation for DMAEngine support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index 7bf675c..06d7239 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -194,6 +194,11 @@
 	 * pipe control
 	 */
 	struct usbhs_pipe_info pipe_info;
+
+	/*
+	 * fifo control
+	 */
+	struct usbhs_fifo_info fifo_info;
 };
 
 /*