tools/intel_vbt_decode: update vbt defs from kernel

Sync up the the VBT definitions from kernel commit
758b018aa283 ("drm/i915/bios: Add the "Disable compression
for the Display Port/HDMI external display" bit")
and adjust the actual code to match.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>