drm/amd/display: Enable DCN401 idle optimizations by default

[WHY&HOW]
Re-enable idle optimizations by default.
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c

@@ -731,7 +731,6 @@ static const struct dc_debug_options debug_defaults_drv = {
 		}
 	},
 	.force_cositing = CHROMA_COSITING_TOPLEFT + 1,
-	.disable_idle_power_optimizations = true,
 	.edp_oled_no_backlight_enable = true,
 };