sim: cgen: move symcat.h include to where it's used

Move this out of the global sim-main.h and to the few files that
actually use functions from it.  Only the cgen ports were pulling
this, so this makes cgen & non-cgen behave more the same.

sim/common/cgen-mem.h

@@ -20,6 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #ifndef CGEN_MEM_H
 #define CGEN_MEM_H
 
+#include "symcat.h"
+
 /* TODO: This should get moved into sim-inline.h.  */
 #ifdef MEMOPS_DEFINE_INLINE
 #define MEMOPS_INLINE

sim/common/sim-close.c

@@ -21,6 +21,8 @@
 /* This must come before any other includes.  */
 #include "defs.h"
 
+#include "symcat.h"
+
 #include "sim-main.h"
 #include "sim-module.h"
 #include "sim/sim.h"

sim/common/sim-core.h

@@ -23,6 +23,7 @@
 #ifndef SIM_CORE_H
 #define SIM_CORE_H
 
+#include "symcat.h"
 
 /* core signals (error conditions)
    Define SIM_CORE_SIGNAL to catch these signals - see sim-core.c for

sim/common/sim-types.h

@@ -29,6 +29,8 @@
 
 #include <stdint.h>
 
+#include "symcat.h"
+
 /* INTEGER QUANTITIES:
 
    TYPES: