Bluetooth: Run special init procedure for unconfigured controllers

For an unconfigured controller it is required to read at least the
local version information. If the set_bdaddr driver callback is
provideded, then also the local Bluetooth address will be read.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>