soc/mediatek/mt8186: add USB support

1. Enable and setup USB drivers.
2. Pull up to a weak resistor for USB3_HUB_RST_L and we reset
   the hub via GPIO149.

TEST=boot kernel from USB ok
BUG=b:202871018

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: Ifcc11d51b0c1e495477957111e6021ef8275f629
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59251
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/corsola/mainboard.c

@@ -1,9 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <device/device.h>
+#include <soc/usb.h>
 
 static void mainboard_init(struct device *dev)
 {
+	setup_usb_host();
 }
 
 static void mainboard_enable(struct device *dev)