drm/i915/bios: Define VBT block 45 (eDP BFI) contents

Define the contents of VBT block 45 (eDP BFI).

Note that I've not actually seen any real world VBTs with this
block.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-28-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>