staging: unisys: visorbus: cleanup goto in setup_crash_devices_work_queue

If visorbus has registered yet just reschedule and exit. The rest of
the function doesn't need to reschedule so just move it up to the
initial check.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Timothy Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>