arch/sh/kernel/time.c: use PTR_ERR_OR_ZERO

Replace IS_ERR/PTR_ERR.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/sh/kernel/time.c

@@ -80,10 +80,8 @@ static int __init rtc_generic_init(void)
 		return -ENODEV;
 
 	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
-	if (IS_ERR(pdev))
-		return PTR_ERR(pdev);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(pdev);
 }
 module_init(rtc_generic_init);