Define the contents of VBT block 20 (OEM Customizable Modes).
Each entry is either 26 or 28 bytes, depending on the BDB version.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-22-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>