vl: Move DisplayType typedef to vl.c

Now the type is only used inside vl.c and doesn't need to be in a
header file.
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

include/sysemu/sysemu.h

@@ -131,16 +131,6 @@ void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name,
 
 int qemu_loadvm_state(QEMUFile *f);
 
-typedef enum DisplayType
-{
-    DT_DEFAULT,
-    DT_CURSES,
-    DT_SDL,
-    DT_COCOA,
-    DT_GTK,
-    DT_NONE,
-} DisplayType;
-
 extern int autostart;
 
 typedef enum {

vl.c

@@ -2077,6 +2077,15 @@ static void select_vgahw(const char *p)
     }
 }
 
+typedef enum DisplayType {
+    DT_DEFAULT,
+    DT_CURSES,
+    DT_SDL,
+    DT_COCOA,
+    DT_GTK,
+    DT_NONE,
+} DisplayType;
+
 static DisplayType select_display(const char *p)
 {
     const char *opts;