staging: vchi: Expose struct vchi_service

This will make further changes easier. The struct will ultimately
disappear.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-26-nsaenzjulienne@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchi/vchi.h

@@ -29,6 +29,13 @@ struct vchi_held_msg {
 	void *message;
 };
 
+struct vchi_service {
+	unsigned int handle;
+
+	vchi_callback callback;
+	void *callback_param;
+};
+
 // structure used to provide the information needed to open a server or a client
 struct service_creation {
 	struct vchi_version version;
@@ -40,9 +47,6 @@ struct service_creation {
 // Opaque handle for a VCHIQ instance
 struct vchiq_instance;
 
-// Opaque handle for a server or client
-struct vchi_service;
-
 /******************************************************************************
  * Global funcs - implementation is specific to which side you are on
  * (local / remote)

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_shim.c

@@ -10,13 +10,6 @@
 #include "vchiq.h"
 #include "vchiq_core.h"
 
-struct vchi_service {
-	unsigned int handle;
-
-	vchi_callback callback;
-	void *callback_param;
-};
-
 int vchi_queue_kernel_message(struct vchi_service *service, void *data,
 			      unsigned int size)
 {