The L2CAP spec recommends specific retransmit and monitor timeouts for
ERTM channels that are on AMP controllers.  These timeouts are
calculated from the AMP controller's best effort flush timeout.

BR/EDR controllers use the default retransmit and monitor timeouts.
Signed-off-by: NMat Martineau <mathewm@codeaurora.org>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>