drm/i915/bios: Define VBT block 18 (Driver Rotation) contents

Define the contents of block 18 (Driver Rotation).
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-19-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -845,6 +845,18 @@ struct bdb_sv_test_functions {
 	u8 sv_bits[8];
 } __packed;
 
+/*
+ * Block 18 - Driver Rotation
+ */
+
+struct bdb_driver_rotation {
+	u8 rotation_enable;
+	u8 rotation_flags_1;
+	u16 rotation_flags_2;
+	u32 rotation_flags_3;
+	u32 rotation_flags_4;
+} __packed;
+
 /*
  * Block 22 - SDVO LVDS General Options
  */