AMD Northbridge LX: add some missing includes

This commit fixes problems if we build raminit.c
for romstage.

Change-Id: Ic1380f3635ac28b939fa2a8ce614814012455c44
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-on: http://review.coreboot.org/3363
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/northbridge/amd/lx/raminit.c

@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <console/console.h>
+#include <cpu/x86/msr.h>
 #include <cpu/amd/lxdef.h>
 #include <arch/io.h>
 #include <spd.h>