mb/*/chromeos.c: Be explicit about code for ramstage

Motivation is to reduce use of !__PRE_RAM__, it does not
mean ENV_RAMSTAGE but we also exclude ENV_SMM with the change.

Change-Id: I1f96bb8c055a3da63274e1ab7f7d4bc70867cbf1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31930
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/intel/baskingridge/chromeos.c

@@ -23,7 +23,7 @@
 #include <southbridge/intel/common/gpio.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
-#ifndef __PRE_RAM__
+#if ENV_RAMSTAGE
 #include <boot/coreboot_tables.h>
 
 #define GPIO_COUNT	6