mb/google/guybrush: Configure eSPI requirements before setting it up

When initializing eSPI early, guybrush has requirements to configure the
bus properly.  Those are normally run in bootblock_mainboard_early_init,
but when setting up eSPI early, those have not run yet.

BUG=192100564
TEST=Build along with previous patch, eSPI works on guybrush

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: Ifec6113d48aea0bb5efe47909e4faf0161148a99
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55864
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/guybrush/bootblock.c

@@ -1,12 +1,25 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <amdblocks/acpimmio.h>
+#include <amdblocks/espi.h>
 #include <bootblock_common.h>
 #include <baseboard/variants.h>
 #include <console/console.h>
 #include <device/pci_ops.h>
 #include <soc/pci_devs.h>
 
+void mb_set_up_early_espi(void)
+{
+	/*
+	 * We don't need to initialize all of the GPIOs that are done
+	 * in bootblock_mainboard_early_init(), but we need to release
+	 * the EC eSPI reset and do the rest of the configuration.
+	 *
+	 * This will not be present in the normal boot flow.
+	 */
+	bootblock_mainboard_early_init();
+}
+
 void bootblock_mainboard_early_init(void)
 {
 	size_t num_gpios;