staging: unisys: refactor find_dev()

Fix the function definition so that it is a single line. Fix CamelCase
parameter names:

busNo => bus_no
devNo => dev_no

Get rid of the goto and just break out of the for loop, since that does
the exact same thing.

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>