Bluetooth: Keep the LE connection parameters in its own structure

This will allow for easier parameterization of these fields. This is
the first step for allowing to change the parameters during runtime.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Bluetooth: Add LE connection parameters to debugfs

Only reading the parameters is supported for now.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Bluetooth: Add support for setting LE connection parameters via debugfs

This will allow for much more pratical measures of the impact of
different connection parameters in different scenarios.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>