staging: unisys: visorbus: adjust tabs in function

Removed extra tabs in visorbus_get_device_by_id function.

Signed-off-by: Steve Wilson <steven.d.wilson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>