VBT reuses a bunch of EDID data structures. Flag those as such
for clarity.

I chose "bdb_edid_" as the namespace for these.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-4-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>