Bluetooth: Fix response on confirm_name

Bluetooth: Fix response on confirm_name

According to mgmt-api.txt, in case of confirm name command,
cmd_complete should be always use as a response. Not command status
as it is now for failures.
Using command complete on failure is actually better as client might
be interested in device address for which confirm name failed.

Signed-off-by: Lukasz Rymanowski <lukasz.rymanowski@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>