Revert "drm/amd/display: Add fallback configuration when set DRR"

This reverts commit d76c0a23.

This change must be reverted since it caused soft hangs when changing
the refresh rate to 122 & 144Hz when using a 7000 series GPU.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reported-by: Mark Broadworth <Mark.Broadworth@amd.com>
Cc: Daniel Wheeler <daniel.wheeler@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c

@@ -293,16 +293,9 @@ static void optc32_set_drr(
 		}
 
 		optc->funcs->set_vtotal_min_max(optc, params->vertical_total_min - 1, params->vertical_total_max - 1);
-		optc32_setup_manual_trigger(optc);
-	} else {
-		REG_UPDATE_4(OTG_V_TOTAL_CONTROL,
-				OTG_SET_V_TOTAL_MIN_MASK, 0,
-				OTG_V_TOTAL_MIN_SEL, 0,
-				OTG_V_TOTAL_MAX_SEL, 0,
-				OTG_FORCE_LOCK_ON_EVENT, 0);
-
-		optc->funcs->set_vtotal_min_max(optc, 0, 0);
 	}
+
+	optc32_setup_manual_trigger(optc);
 }
 
 static struct timing_generator_funcs dcn32_tg_funcs = {