nir: include what we want/need

Swap core.h with macros.h, as the latter provides the required MAX2
macro.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

src/glsl/nir/glsl_types.cpp

@@ -22,7 +22,7 @@
  */
 
 #include <stdio.h>
-#include "main/core.h" /* for Elements, MAX2 */
+#include "main/macros.h"
 #include "glsl_parser_extras.h"
 #include "glsl_types.h"
 #include "util/hash_table.h"