Declare recovery and developer modes outside ChromeOS

Move the implementation for recovery and developer modes from
vendorcode/google/chromes to lib/.

Change-Id: I33335fb282de2c7bc613dc58d6912c47f3b5c06c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/4308
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/northbridge/intel/sandybridge/raminit.c

@@ -19,6 +19,7 @@
 
 #include <console/console.h>
 #include <console/usb.h>
+#include <bootmode.h>
 #include <string.h>
 #include <arch/hlt.h>
 #include <arch/io.h>
@@ -34,11 +35,6 @@
 
 /* Management Engine is in the southbridge */
 #include "southbridge/intel/bd82x6x/me.h"
-#if CONFIG_CHROMEOS
-#include <vendorcode/google/chromeos/chromeos.h>
-#else
-#define recovery_mode_enabled(x) 0
-#endif
 
 /*
  * MRC scrambler seed offsets should be reserved in