usb: renesas_usbhs: change d{0,1}fifo to dfifo array

To extend DnFIFOs in the future, this patch changes d{0,1}fifo of
usbhs_fifo_info to dfifo array.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/renesas_usbhs/fifo.c

@@ -21,8 +21,8 @@
 #include "pipe.h"
 
 #define usbhsf_get_cfifo(p)	(&((p)->fifo_info.cfifo))
-#define usbhsf_get_d0fifo(p)	(&((p)->fifo_info.d0fifo))
-#define usbhsf_get_d1fifo(p)	(&((p)->fifo_info.d1fifo))
+#define usbhsf_get_d0fifo(p)	(&((p)->fifo_info.dfifo[0]))
+#define usbhsf_get_d1fifo(p)	(&((p)->fifo_info.dfifo[1]))
 #define usbhsf_is_cfifo(p, f)	(usbhsf_get_cfifo(p) == f)
 
 #define usbhsf_fifo_is_busy(f)	((f)->pipe) /* see usbhs_pipe_select_fifo */

drivers/usb/renesas_usbhs/fifo.h

@@ -38,10 +38,10 @@ struct usbhs_fifo {
 	struct sh_dmae_slave	rx_slave;
 };
 
+#define USBHS_MAX_NUM_DFIFO	2
 struct usbhs_fifo_info {
 	struct usbhs_fifo cfifo;
-	struct usbhs_fifo d0fifo;
-	struct usbhs_fifo d1fifo;
+	struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
 };
 
 struct usbhs_pkt_handle;