Bluetooth: Mgmt command for adding connection parameters

This patch introduces a new Mgmt command (MGMT_OP_ADD_CONN_PARAMS)
to specify the connection parameters the kernel should use when
establishing connections to a certain device. Moreover, this command
also specifies the auto connection option the device requires.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Mgmt command for removing connection parameters

This patch introduces the MGMT_OP_REMOVE_CONN_PARAMS which removes
from hdev's list the connection parameters from a given device.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>