Make sure common.h is the first include.

If common.h isn't first we can get CONFIG_ options defined in the
board config file ignored.  This can cause an issue if any of those
config options impact the size of types of data structures
(eg CONFIG_PHYS_64BIT).
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

common/dlmalloc.c

+#include <common.h>
+
 #if 0	/* Moved to malloc.h */
 /* ---------- To make a malloc.h, start cutting here ------------ */
 
@@ -947,7 +949,6 @@ void malloc_stats();
 #endif	/* 0 */
 
 #endif	/* 0 */			/* Moved to malloc.h */
-#include <common.h>
 
 DECLARE_GLOBAL_DATA_PTR;