Unify coreboot table generation

coreboot tables are, unlike general system tables, a platform
independent concept. Hence, use the same code for coreboot table
generation on all platforms. lib/coreboot_tables.c is based
on the x86 version of the file, because some important fixes
were missed on the ARMv7 version lately.

Change-Id: Icc38baf609f10536a320d21ac64408bef44bb77d
Signed-off-by: Stefan Reinauer <reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/2863
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)

src/mainboard/google/link/mainboard.c

@@ -32,7 +32,7 @@
 #include <arch/acpi.h>
 #include <arch/io.h>
 #include <arch/interrupt.h>
-#include <arch/coreboot_tables.h>
+#include <boot/coreboot_tables.h>
 #include "hda_verb.h"
 #include "onboard.h"
 #include "ec.h"