google/guybrush: Move SPI speed override

SPI speed override is not related to ChromeOS, thus the
location in chromeos.c was poor choice.

Change-Id: Ie3db89f252af1f44e9539497c05bdf965565a191
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58945
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/google/guybrush/Makefile.inc

@@ -18,6 +18,8 @@ ramstage-y += mainboard.c
 ramstage-y += ec.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 
+all-y += spi_speeds.c
+
 verstage-y += verstage.c
 verstage-$(CONFIG_CHROMEOS) += chromeos.c
 

src/mainboard/google/guybrush/chromeos.c

@@ -1,8 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include <amdblocks/spi.h>
 #include <baseboard/gpio.h>
-#include <boardid.h>
 #include <bootmode.h>
 #include <boot/coreboot_tables.h>
 #include <gpio.h>
@@ -27,11 +25,3 @@ void mainboard_chromeos_acpi_generate(void)
 {
 	chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios));
 }
-
-void mainboard_spi_fast_speed_override(uint8_t *fast_speed)
-{
-	uint32_t board_ver = board_id();
-
-	if (board_ver >= CONFIG_OVERRIDE_EFS_SPI_SPEED_MIN_BOARD)
-		*fast_speed = CONFIG_OVERRIDE_EFS_SPI_SPEED;
-}

src/mainboard/google/guybrush/spi_speeds.c

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <amdblocks/spi.h>
+#include <boardid.h>
+#include <stdint.h>
+
+void mainboard_spi_fast_speed_override(uint8_t *fast_speed)
+{
+	uint32_t board_ver = board_id();
+
+	if (board_ver >= CONFIG_OVERRIDE_EFS_SPI_SPEED_MIN_BOARD)
+		*fast_speed = CONFIG_OVERRIDE_EFS_SPI_SPEED;
+}