Bluetooth: Ignore Tx Window value with Streaming mode

Tx Window value shall not be used with Streaming Mode and the receiver
of the config Request shall ignore its value.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>