usb: renesas_usbhs: tidyup pio handler name

This patch tidyup PIO packet handler name.
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/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 3c58248..89d2b16 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -309,10 +309,10 @@
 
 	switch (stage) {
 	case READ_DATA_STAGE:
-		dcp->handler = &usbhs_fifo_push_handler;
+		dcp->handler = &usbhs_fifo_pio_push_handler;
 		break;
 	case WRITE_DATA_STAGE:
-		dcp->handler = &usbhs_fifo_pop_handler;
+		dcp->handler = &usbhs_fifo_pio_pop_handler;
 		break;
 	case NODATA_STATUS_STAGE:
 		dcp->handler = &usbhs_ctrl_stage_end_handler;
@@ -406,9 +406,9 @@
 		pipe->mod_private	= uep;
 
 		if (usb_endpoint_dir_in(desc))
-			uep->handler = &usbhs_fifo_push_handler;
+			uep->handler = &usbhs_fifo_pio_push_handler;
 		else
-			uep->handler = &usbhs_fifo_pop_handler;
+			uep->handler = &usbhs_fifo_pio_pop_handler;
 
 		ret = 0;
 	}