ui/vc: move VCChardev declaration at the top

To allow easier refactoring in following patches.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230830093843.3531473-13-marcandre.lureau@redhat.com>

ui/console.c

@@ -127,6 +127,12 @@ struct QemuConsole {
     QTAILQ_ENTRY(QemuConsole) next;
 };
 
+struct VCChardev {
+    Chardev parent;
+    QemuConsole *console;
+};
+typedef struct VCChardev VCChardev;
+
 struct DisplayState {
     QEMUTimer *gui_timer;
     uint64_t last_update;
@@ -1051,12 +1057,6 @@ void console_select(unsigned int index)
     }
 }
 
-struct VCChardev {
-    Chardev parent;
-    QemuConsole *console;
-};
-typedef struct VCChardev VCChardev;
-
 #define TYPE_CHARDEV_VC "chardev-vc"
 DECLARE_INSTANCE_CHECKER(VCChardev, VC_CHARDEV,
                          TYPE_CHARDEV_VC)