drm/amd/display: Revert "drm/amd/display: disable idle optimizations"

This reverts commit e7ef5569e71bf3fec01ea513c27c6081c0dbbc64.

Idle optimization was disabled due to SMU and firmware bugs. Enable it
back for DCN32. DCN321 has them enabled already

Fixes: 6a640b95 ("drm/amd/display: disable idle optimizations")
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-and-tested-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c

@@ -972,7 +972,6 @@ static const struct dc_debug_options debug_defaults_drv = {
 	.timing_trace = false,
 	.clock_trace = true,
 	.disable_pplib_clock_request = false,
-	.disable_idle_power_optimizations = true,
 	.pipe_split_policy = MPC_SPLIT_DYNAMIC,
 	.force_single_disp_pipe_split = false,
 	.disable_dcc = DCC_ENABLE,