drm/i915: Allow alternate fixed modes always for LVDS

As with eDP let's stop considering the VBTs DRRS knobs and
just always accept all otherwise suitable EDID modes. This
appears to be how Windows does it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220927180615.25476-4-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>