mesa: include mtypes.h less

- remove mtypes.h from most header files
- add main/menums.h for often used definitions
- remove main/core.h

v2: fix radv build

Reviewed-by: Brian Paul <brianp@vmware.com>

src/compiler/glsl/s_expression.h

@@ -25,7 +25,6 @@
 #ifndef S_EXPRESSION_H
 #define S_EXPRESSION_H
 
-#include "main/core.h" /* for Elements */
 #include "util/strtod.h"
 #include "list.h"