drivers/video/da8xx-fb.c: fix error return

The return should be negative on errors
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/da8xx-fb.c

@@ -704,7 +704,7 @@ static int __init fb_probe(struct platform_device *device)
 
 	if (i == ARRAY_SIZE(known_lcd_panels)) {
 		dev_err(&device->dev, "GLCD: No valid panel found\n");
-		ret = ENODEV;
+		ret = -ENODEV;
 		goto err_clk_disable;
 	} else
 		dev_info(&device->dev, "GLCD: Found %s panel\n",