staging: unisys: fix CamelCase parameters in delbusdevices()

Fix the CamelCase parameter in delbusdevices() in visorchipset.h:

busNo => bus_no

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