When firmware connection manager is in use we should not touch the lane
adapter (well or any) configuration space so do this only when we know
that the software connection manager is active.

Fixes: 8e1de704 ("thunderbolt: Add support for XDomain lane bonding")
Cc: stable@vger.kernel.org
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>