drm/i915/bios: Define VBT block 28 (EFP DTD) contents

Define the contents of VBT block 28 (EFP DTD).
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-27-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_vbt_defs.h

@@ -167,6 +167,7 @@ enum bdb_block_id {
 	BDB_SDVO_LVDS_PPS		= 25,
 	BDB_TV_OPTIONS			= 26,
 	BDB_EDP				= 27,
+	BDB_EFP_DTD			= 28, /* 161+ */
 	BDB_DISPLAY_SELECT_IVB		= 29, /* 164+ */
 	BDB_DISPLAY_REMOVE_IVB		= 30, /* 164+ */
 	BDB_DISPLAY_SELECT_HSW		= 31, /* 166+ */
@@ -1072,6 +1073,14 @@ struct bdb_edp {
 	u16 edp_dsc_disable;					/* 251+ */
 } __packed;
 
+/*
+ * Block 28 - EFP DTD Block
+ */
+
+struct bdb_efp_dtd {
+	struct bdb_edid_dtd dtd[3];
+} __packed;
+
 /*
  * Block 29 - Toggle List Block (IVB)
  */