drm/sun4i: ui_scaler: drop sanity checks

They can't be triggered if mixer configuration is properly specified in
quirks. Additionally, number of VI channels won't be available in future
due to rework for DE33 support.

Reviewed-by: Chen-Yu Tsai <wens@kernel.org>
Tested-by: Ryan Walklin <ryan@testtoast.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patch.msgid.link/20251104180942.61538-26-jernej.skrabec@gmail.com
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>

Author: jernejsk

drivers/gpu/drm/sun4i/sun8i_ui_scaler.c

@@ -132,9 +132,6 @@ void sun8i_ui_scaler_enable(struct sun8i_layer *layer, bool enable)
 	struct sun8i_mixer *mixer = layer->mixer;
 	u32 val, base;
 
-	if (WARN_ON(layer->channel < mixer->cfg->vi_num))
-		return;
-
 	base = sun8i_ui_scaler_base(mixer, layer->channel);
 
 	if (enable)
@@ -155,9 +152,6 @@ void sun8i_ui_scaler_setup(struct sun8i_layer *layer,
 	int i, offset;
 	u32 base;
 
-	if (WARN_ON(layer->channel < mixer->cfg->vi_num))
-		return;
-
 	base = sun8i_ui_scaler_base(mixer, layer->channel);
 
 	hphase <<= SUN8I_UI_SCALER_PHASE_FRAC - 16;