staging: vchiq: Don't use a typedef for vchiq_callback

Linux coding style says to avoid typdefs.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-30-nsaenzjulienne@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -35,7 +35,10 @@ struct vchi_service {
 struct service_creation {
 	struct vchi_version version;
 	int32_t service_id;
-	vchiq_callback callback;
+	enum vchiq_status (*callback)(enum vchiq_reason reason,
+				      struct vchiq_header *header,
+				      unsigned int handle,
+				      void *bulk_userdata);
 	void *callback_param;
 };
 

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

@@ -60,19 +60,21 @@ struct vchiq_element {
 	unsigned int size;
 };
 
-typedef enum vchiq_status (*vchiq_callback)(enum vchiq_reason,
-					    struct vchiq_header *,
-					    unsigned int, void *);
-
 struct vchiq_service_base {
 	int fourcc;
-	vchiq_callback callback;
+	enum vchiq_status (*callback)(enum vchiq_reason reason,
+				      struct vchiq_header *header,
+				      unsigned int handle,
+				      void *bulk_userdata);
 	void *userdata;
 };
 
 struct vchiq_service_params {
 	int fourcc;
-	vchiq_callback callback;
+	enum vchiq_status (*callback)(enum vchiq_reason reason,
+				      struct vchiq_header *header,
+				      unsigned int handle,
+				      void *bulk_userdata);
 	void *userdata;
 	short version;       /* Increment for non-trivial changes */
 	short version_min;   /* Update for incompatible changes */