Cleanup coreboot memory table includes

The includes removed here were previously required for
struct lb_memory and lb_add_memory_range().

Change-Id: Ie6c0d4ef55c2225aa709cf3fbad30ff1080e3610
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1391
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)

src/mainboard/intel/emeraldlake2/chromeos.c

@@ -29,7 +29,6 @@
 #include <southbridge/intel/bd82x6x/pch.h>
 
 #ifndef __PRE_RAM__
-#include <boot/coreboot_tables.h>
 #include <arch/coreboot_tables.h>
 
 #define GPIO_COUNT	5