drm/tegra: dc: Omit superfluous error message in tegra_dc_probe()

In the function tegra_dc_probe(), when get irq failed, the function
platform_get_irq() logs an error message, so remove redundant message
here.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dc.c

@@ -2556,10 +2556,8 @@ static int tegra_dc_probe(struct platform_device *pdev)
 		return PTR_ERR(dc->regs);
 
 	dc->irq = platform_get_irq(pdev, 0);
-	if (dc->irq < 0) {
-		dev_err(&pdev->dev, "failed to get IRQ\n");
+	if (dc->irq < 0)
 		return -ENXIO;
-	}
 
 	err = tegra_dc_rgb_probe(dc);
 	if (err < 0 && err != -ENODEV) {