ChromeOS boards: Fix includes

Change-Id: Ib8448f3d36a23538cd9fea897f09da3ec4ad007a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5647
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/google/snow/chromeos.c b/src/mainboard/google/snow/chromeos.c
index c525a81..de882ab 100644
--- a/src/mainboard/google/snow/chromeos.c
+++ b/src/mainboard/google/snow/chromeos.c
@@ -23,6 +23,7 @@
 #include <ec/google/chromeec/ec_commands.h>
 #include <string.h>
 #include <vendorcode/google/chromeos/chromeos.h>
+#include <bootmode.h>
 #include <cpu/samsung/exynos5250/cpu.h>
 #include <cpu/samsung/exynos5250/gpio.h>