mb/google/guybrush: Add stubs to configure GPIOs

BUG=b:175143925
TEST=builds

Signed-off-by: Mathew King <mathewk@chromium.org>
Change-Id: I5afd2df396ba41f7d25fa7ff6879b7c1f82f438c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49954
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/mainboard/google/guybrush/mainboard.c b/src/mainboard/google/guybrush/mainboard.c
index 3dc2c41..f4466d1 100644
--- a/src/mainboard/google/guybrush/mainboard.c
+++ b/src/mainboard/google/guybrush/mainboard.c
@@ -1,10 +1,23 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
+#include <baseboard/variants.h>
 #include <device/device.h>
 
+static void mainboard_configure_gpios(void)
+{
+	size_t base_num_gpios, override_num_gpios;
+	const struct soc_amd_gpio *base_gpios, *override_gpios;
+
+	base_gpios = variant_base_gpio_table(&base_num_gpios);
+	override_gpios = variant_override_gpio_table(&override_num_gpios);
+
+	gpio_configure_pads_with_override(base_gpios, base_num_gpios, override_gpios,
+					  override_num_gpios);
+}
+
 static void mainboard_init(void *chip_info)
 {
-	/* TODO: Perform mainboard initialization */
+	mainboard_configure_gpios();
 }
 
 static void mainboard_enable(struct device *dev)