USB / Renesas: Fix build issue related to struct scatterlist

Fix build issue caused by undefined struct scatterlist in
drivers/usb/renesas_usbhs/fifo.c.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/usb/renesas_usbhs/fifo.c

@@ -16,6 +16,7 @@
  */
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/scatterlist.h>
 #include "./common.h"
 #include "./pipe.h"