drm/komeda: plane: Remove redundant color encoding and range initialisation

The komeda KMS driver will call drm_plane_create_color_properties() with
a default encoding and range values of BT601 and Limited Range,
respectively.

Since the initial value wasn't carried over in the state, the driver had
to set it again in komeda_plane_reset(). However, the helpers have been
adjusted to set it properly at reset, so this is not needed anymore.

Cc: Brian Starkey <brian.starkey@arm.com>
Cc: "James (Qian) Wang" <james.qian.wang@arm.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mihail Atanassov <mihail.atanassov@arm.com>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220221095918.18763-20-maxime@cerno.tech

drivers/gpu/drm/arm/display/komeda/komeda_plane.c

@@ -143,11 +143,8 @@ static void komeda_plane_reset(struct drm_plane *plane)
 	plane->state = NULL;
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
+	if (state)
 		__drm_atomic_helper_plane_reset(plane, &state->base);
-		state->base.color_encoding = DRM_COLOR_YCBCR_BT601;
-		state->base.color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
-	}
 }
 
 static struct drm_plane_state *