staging: vchiq: Make vchiq_add_service() local

The function is being exported although there is no use for it outside
of vchiq's core code. Keep it local then.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629150945.10720-39-nsaenzjulienne@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -271,7 +271,7 @@ enum vchiq_status vchiq_connect(struct vchiq_instance *instance)
 }
 EXPORT_SYMBOL(vchiq_connect);
 
-enum vchiq_status vchiq_add_service(
+static enum vchiq_status vchiq_add_service(
 	struct vchiq_instance             *instance,
 	const struct vchiq_service_params *params,
 	unsigned int       *phandle)
@@ -308,7 +308,6 @@ enum vchiq_status vchiq_add_service(
 
 	return status;
 }
-EXPORT_SYMBOL(vchiq_add_service);
 
 enum vchiq_status vchiq_open_service(
 	struct vchiq_instance             *instance,

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

@@ -94,9 +94,6 @@ struct vchiq_instance;
 extern enum vchiq_status vchiq_initialise(struct vchiq_instance **pinstance);
 extern enum vchiq_status vchiq_shutdown(struct vchiq_instance *instance);
 extern enum vchiq_status vchiq_connect(struct vchiq_instance *instance);
-extern enum vchiq_status vchiq_add_service(struct vchiq_instance *instance,
-	const struct vchiq_service_params *params,
-	unsigned int *pservice);
 extern enum vchiq_status vchiq_open_service(struct vchiq_instance *instance,
 	const struct vchiq_service_params *params,
 	unsigned int *pservice);