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

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

Since the initial value wasn't carried over in the state, the driver had
to set it again in omap_plane_reset(). However, the helpers have been
adjusted to set it properly at reset, so this is not needed anymore.
Reviewed-by: Tomi Valkeinen <tomba@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220221095918.18763-23-maxime@cerno.tech

drivers/gpu/drm/omapdrm/omap_plane.c

@@ -403,7 +403,6 @@ void omap_plane_install_properties(struct drm_plane *plane,
 
 static void omap_plane_reset(struct drm_plane *plane)
 {
-	struct omap_plane *omap_plane = to_omap_plane(plane);
 	struct omap_plane_state *omap_state;
 
 	if (plane->state)
@@ -414,8 +413,6 @@ static void omap_plane_reset(struct drm_plane *plane)
 		return;
 
 	__drm_atomic_helper_plane_reset(plane, &omap_state->base);
-	plane->state->color_encoding = DRM_COLOR_YCBCR_BT601;
-	plane->state->color_range = DRM_COLOR_YCBCR_FULL_RANGE;
 }
 
 static struct drm_plane_state *