amdfam10 boards: Add Makefiles and fix resourcemap.c

Also remove global ramstage-y += get_bus_conf.c, this is
specific to amdfam10.

Change-Id: I49b604ebff6bcfe85518b2c3896ab798c3c7878d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30629
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/avalue/eax-785e/resourcemap.c

@@ -13,7 +13,11 @@
  * GNU General Public License for more details.
  */
 
-static void setup_mb_resource_map(void)
+#include <arch/io.h>
+#include <commonlib/helpers.h>
+#include <northbridge/amd/amdfam10/amdfam10.h>
+
+void setup_mb_resource_map(void)
 {
 	static const unsigned int register_values[] = {
 		/* Careful set limit registers before base registers which contain the enables */