src/mainboard: Add missing 'include <types.h>'

<types.h> is supposed to provide <stdint.h> and <stddef.h>.
So when <types.h> is included, <stdint.h> and/or <stddef.h> is removed.

Change-Id: I3b1a395cfe8b710fb6b468e68f4c92e063794568
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
diff --git a/src/mainboard/siemens/mc_apl1/mainboard.c b/src/mainboard/siemens/mc_apl1/mainboard.c
index b39b681..c931e10 100644
--- a/src/mainboard/siemens/mc_apl1/mainboard.c
+++ b/src/mainboard/siemens/mc_apl1/mainboard.c
@@ -28,6 +28,7 @@
 #include <string.h>
 #include <timer.h>
 #include <baseboard/variants.h>
+#include <types.h>
 
 #define MAX_PATH_DEPTH		12
 #define MAX_NUM_MAPPINGS	10