ICH8M on apple macbook pro occasionally locks up completely during PCS
initialization if ports other than the first one are enabled.  Add a
separate controller ID and only enable the first port.

tj: commit description added and patch updated to fit with the
    previous controller ID update.
Signed-off-by: Thomas Rohwer <tr@tng.de>
Signed-off-by: Tejun Heo <htejun@gmail.com>