drm/i915/vbt: Add VRR VBT toggle

This will be used in future but already adding to VBT so we are
updated with VBT changes.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201008211932.24989-3-jose.souza@intel.com

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

@@ -835,6 +835,7 @@ struct bdb_lfp_power {
 	u16 lace_enabled_status;
 	struct agressiveness_profile_entry aggressivenes[16];
 	u16 hobl; /* 232+ */
+	u16 vrr_feature_enabled; /* 233+ */
 } __packed;
 
 /*