Bluetooth: Initialize hci_conn fields in hci_connect_le

This patch moves some hci_conn fields initialization from hci_le_
create_connection() to hci_connect_le(). It makes more sense to
initialize these fields within the function that creates the hci_
conn object.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>