staging: unisys: visorchannel: Rename CamelCase variable nQueues

Rename the visorchannel_debug parameter nQueues to num_queues.

Signed-off-by: Bryan Thompson <bryan.thompson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>