drm/i915: Suppress spurious combo PHY B warning

On ICL the DMC doesn't reinit combo PHY B so we should not warn
about its state being bogus during the display core uninit.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190411143349.17934-1-ville.syrjala@linux.intel.com


Reviewed-by: Imre Deak <imre.deak@intel.com>