m68k/q40: Use PTR_RET rather than if(IS_ERR(...)) + PTR_ERR

The semantic patch that makes this change is available
in scripts/coccinelle/api/ptr_ret.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/q40/config.c

@@ -338,9 +338,6 @@ static __init int q40_add_kbd_device(void)
 		return -ENODEV;
 
 	pdev = platform_device_register_simple("q40kbd", -1, NULL, 0);
-	if (IS_ERR(pdev))
-		return PTR_ERR(pdev);
-
-	return 0;
+	return PTR_RET(pdev);
 }
 arch_initcall(q40_add_kbd_device);