video: fbdev: don't print error message on platform_get_irq() failure

The platform_get_irq() can print error message, so remove the redundant
dev_err() here.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200406053450.8380-1-tangbin@cmss.chinamobile.com

drivers/video/fbdev/atmel_lcdfb.c

@@ -1114,7 +1114,6 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
 
 	sinfo->irq_base = platform_get_irq(pdev, 0);
 	if (sinfo->irq_base < 0) {
-		dev_err(dev, "unable to get irq\n");
 		ret = sinfo->irq_base;
 		goto stop_clk;
 	}