staging: unisys: refactor delete_bus_glue()

Fix the function declaration to be a single line, and rename the CamelCase
parameter:

busNo => bus_no

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>