amd/geode_lx: Fix .c includes

Change-Id: I2cce52561d30e30e1c81752cd2a455e7211006eb
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/26825
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Piotr Król <piotr.krol@3mdeb.com>

src/include/cpu/amd/lxdef.h

@@ -644,6 +644,10 @@
 #define DELAY_LOWER_STATUS_MASK		0x7C0
 
 #if !defined(__ASSEMBLER__)
+
+#include <stdint.h>
+#include <arch/cpu.h>
+
 #if defined(__PRE_RAM__)
 void cpuRegInit(int debug_clock_disable, u8 dimm0, u8 dimm1, int terminated);
 void SystemPreInit(void);