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/northbridge/amd/amdfam10/amdfam10.h

@@ -1000,6 +1000,7 @@ void setup_resource_map_x_offset(const u32 *register_values, u32 max, u32
 
 void setup_resource_map_x(const u32 *register_values, u32 max);
 void setup_resource_map(const u32 *register_values, u32 max);
+void setup_mb_resource_map(void);
 
 /* reset_test.c */
 u32 cpu_init_detected(u8 nodeid);