mb/google/rauru: Reset USB hub in bootblock

We have to reset the USB hub as early as possible. Otherwise the USB3
hub may not be usable in the payload. This design has been introduced
since Cherry.

TEST=build pass.
BUG=b:317009620

Change-Id: Iea793b4b04bd009d0354e2331604bccf30466a23
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84024
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/rauru/bootblock.c

@@ -3,7 +3,15 @@
 #include <bootblock_common.h>
 #include <soc/spi.h>
 
+#include "gpio.h"
+
+static void usb3_hub_reset(void)
+{
+	gpio_output(GPIO(USB_RST), 1);
+}
+
 void bootblock_mainboard_init(void)
 {
 	mtk_snfc_init();
+	usb3_hub_reset();
 }