video: amba-clcd: Spout an error if of_get_display_timing() gives an error

In the patch ("video: of: display_timing: Don't yell if no timing node
is present") we'll stop spouting an error directly in
of_get_display_timing() if no node is present.  Presumably amba-clcd
should take charge of spouting its own error now.

NOTE: we'll print two errors if the node was present but there were
problems parsing the timing node (one in of_parse_display_timing() and
this new one).  Since this is a fatal error for the driver's probe
(and presumably someone will be debugging), this should be OK.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190722182439.44844-5-dianders@chromium.org

drivers/video/fbdev/amba-clcd.c

@@ -561,8 +561,10 @@ static int clcdfb_of_get_dpi_panel_mode(struct device_node *node,
 	struct videomode video;
 
 	err = of_get_display_timing(node, "panel-timing", &timing);
-	if (err)
+	if (err) {
+		pr_err("%pOF: problems parsing panel-timing (%d)\n", node, err);
 		return err;
+	}
 
 	videomode_from_timing(&timing, &video);