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>