staging: unisys: refactor bus_configure()

First, fix the CamelCase names:

busNo => bus_no
pBusInfo => bus_info

Update all references to use the corrected names, and remove the messy
goto and label.

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