drm/i915/bios: Define the "luminance and gamma" sub-struct of block 46

Since BDB version 211 block 46 has included more luminance and
gamma related information. Define it fully. The data is semi-based
on DisplayID v2.0 apparently.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240605134756.17099-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -1395,8 +1395,20 @@ struct chromaticity {
 	u8 white_y_hi;
 } __packed;
 
+struct luminance_and_gamma {
+	u8 luminance_enable:1;						/* 211+ */
+	u8 gamma_enable:1;						/* 211+ */
+	u8 rsvd:6;
+
+	u16 min_luminance;						/* 211+ */
+	u16 max_luminance;						/* 211+ */
+	u16 one_percent_max_luminance;					/* 211+ */
+	u8 gamma;							/* 211+ */
+} __packed;
+
 struct bdb_chromaticity {
 	struct chromaticity chromaticity[16];
+	struct luminance_and_gamma luminance_and_gamma[16];		/* 211+ */
 } __packed;
 
 /*