drm/amd/display: Move unity TF type to predefined types

Also handle fixpoint y values for CM curves

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 74286d3..939fa6f 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -343,7 +343,6 @@ enum dc_transfer_func_type {
 	TF_TYPE_PREDEFINED,
 	TF_TYPE_DISTRIBUTED_POINTS,
 	TF_TYPE_BYPASS,
-	TF_TYPE_UNITY
 };
 
 struct dc_transfer_func_distributed_points {
@@ -362,6 +361,7 @@ enum dc_transfer_func_predefined {
 	TRANSFER_FUNCTION_BT709,
 	TRANSFER_FUNCTION_PQ,
 	TRANSFER_FUNCTION_LINEAR,
+	TRANSFER_FUNCTION_UNITY,
 };
 
 struct dc_transfer_func {