drm/amd/display: Change wb_h/vratio to double

Signed-off-by: NEric Bernstein <eric.bernstein@amd.com>
Reviewed-by: NDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: NHarry Wentland <harry.wentland@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h

@@ -215,8 +215,8 @@ struct writeback_st {
 	int wb_vtaps_luma;
 	int wb_htaps_chroma;
 	int wb_vtaps_chroma;
-	int wb_hratio;
-	int wb_vratio;
+	double wb_hratio;
+	double wb_vratio;
 };
 
 struct	_vcs_dpi_display_output_params_st	{