drm/amd/display: enable dcn35 idle power optimization

[Why]
Idle power optimization was disabled on dcn35 by default.

[How]
Enable by setting disable_idle_power_optimizations to false.
Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c

@@ -768,7 +768,7 @@ static const struct dc_debug_options debug_defaults_drv = {
 	.enable_hpo_pg_support = false,
 	.enable_legacy_fast_update = true,
 	.enable_single_display_2to1_odm_policy = false,
-	.disable_idle_power_optimizations = true,
+	.disable_idle_power_optimizations = false,
 	.dmcub_emulation = false,
 	.disable_boot_optimizations = false,
 	.disable_unbounded_requesting = false,