drm/panel: lvds: Drop now redundant width-mm and height-mm check

The check for mandatory DT properties width-mm and height-mm is now
part of of_get_drm_panel_display_mode(), drop the redundant check
from this driver.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dmitry Osipenko <digetx@gmail.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
To: dri-devel@lists.freedesktop.org
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220411004728.68203-2-marex@denx.de

drivers/gpu/drm/panel/panel-lvds.c

@@ -128,18 +128,6 @@ static int panel_lvds_parse_dt(struct panel_lvds *lvds)
 		return ret;
 	}
 
-	if (lvds->dmode.width_mm == 0) {
-		dev_err(lvds->dev, "%pOF: invalid or missing %s DT property\n",
-			np, "width-mm");
-		return -ENODEV;
-	}
-
-	if (lvds->dmode.height_mm == 0) {
-		dev_err(lvds->dev, "%pOF: invalid or missing %s DT property\n",
-			np, "height-mm");
-		return -ENODEV;
-	}
-
 	of_property_read_string(np, "label", &lvds->label);
 
 	ret = drm_of_lvds_get_data_mapping(np);