rockchip: gru: Add USB DRD DWC3 controller support

This patch adds code to initialize the two DWC3 USB
host controllers, and uses them to initialize USB3.0
on the gru rk3399 board.

BRANCH=none
BUG=chrome-os-partner:52684
TEST=boot from USB3.0 on gru/kevin rk3399 platform

Change-Id: If6a6e56f3a7c7ce8e8b098634cfc2f250a91810d
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 0306a9e
Original-Change-Id: I796fa1133510876f75873d134ea752e1b52e40a8
Original-Signed-off-by: Liangfeng Wu <wulf@rock-chips.com>
Original-Signed-off-by: Douglas Anderson <dianders@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/347524
Original-Commit-Ready: Brian Norris <briannorris@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/15112
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c
index bbe0224..e6baebe 100644
--- a/src/mainboard/google/gru/mainboard.c
+++ b/src/mainboard/google/gru/mainboard.c
@@ -24,6 +24,7 @@
 #include <soc/emmc.h>
 #include <soc/grf.h>
 #include <soc/i2c.h>
+#include <soc/usb.h>
 
 #include "board.h"
 
@@ -118,12 +119,19 @@
 	gpio_output(GPIO(4, D, 3), 1); /* CPU3_EDP_VDDEN for P3.3V_DISP */
 }
 
+static void setup_usb(void)
+{
+	setup_usb_drd0_dwc3();
+	setup_usb_drd1_dwc3();
+}
+
 static void mainboard_init(device_t dev)
 {
 	configure_sdmmc();
 	configure_emmc();
 	configure_codec();
 	configure_display();
+	setup_usb();
 }
 
 static void enable_backlight_booster(void)