staging: vchiq_debugfs: Use forward declarations

Use forward declarations for struct vchiq_state and vchiq_instance.
We can then drop the vchiq_core.h header from vchiq_debugfs.h.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20241107194806.90408-4-umang.jain@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Umang Jain

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.h

@@ -4,7 +4,8 @@
 #ifndef VCHIQ_DEBUGFS_H
 #define VCHIQ_DEBUGFS_H
 
-#include "vchiq_core.h"
+struct vchiq_state;
+struct vchiq_instance;
 
 struct vchiq_debugfs_node {
 	struct dentry *dentry;