staging: unisys: include: Add function definition argument identifier

Adds identifier to function definition arguments to satisfy checkpatch
warnings:

WARNING: function definition argument 'struct visor_driver *' should also
	have an identifier name
WARNING: function definition argument 'struct visor_driver *' should also
	have an identifier name
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/include/visorbus.h

@@ -172,8 +172,8 @@ struct visor_device {
 
 #define to_visor_device(x) container_of(x, struct visor_device, device)
 
-int visorbus_register_visor_driver(struct visor_driver *);
-void visorbus_unregister_visor_driver(struct visor_driver *);
+int visorbus_register_visor_driver(struct visor_driver *drv);
+void visorbus_unregister_visor_driver(struct visor_driver *drv);
 int visorbus_read_channel(struct visor_device *dev,
 			  unsigned long offset, void *dest,
 			  unsigned long nbytes);