mb/google/guybrush: Implement tis_plat_irq_status

BUG=b:185397933
TEST=boot guybrush and no longer see tis_plat_irq_status warnings

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I9b67cb59221d4e355df8e8a2205e03ead7dba51f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52352
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/mainboard/google/guybrush/variants/baseboard/Makefile.inc

@@ -1,7 +1,11 @@
 bootblock-y += gpio.c
 
+romstage-y += tpm_tis.c
+
 ramstage-y += gpio.c
+ramstage-y += tpm_tis.c
 
 verstage-y += gpio.c
+verstage-y += tpm_tis.c
 
 smm-y += gpio.c

src/mainboard/google/guybrush/variants/baseboard/tpm_tis.c

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <security/tpm/tis.h>
+#include <soc/gpio.h>
+
+int tis_plat_irq_status(void)
+{
+	return gpio_interrupt_status(GPIO_3);
+}