[MIPS] Cleanup pcspeaker platform device registration.

Move registration into the actual platform code instead of making a
desparate attempt at sharing the hand full of likes of code in pcspeaker.c.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/pcspeaker.c

@@ -1,28 +0,0 @@
-/*
- * Copyright (C) 2006 IBM Corporation
- *
- * Implements device information for i8253 timer chip
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation
- */
-
-#include <linux/platform_device.h>
-
-static __init int add_pcspkr(void)
-{
-	struct platform_device *pd;
-	int ret;
-
-	pd = platform_device_alloc("pcspkr", -1);
-	if (!pd)
-		return -ENOMEM;
-
-	ret = platform_device_add(pd);
-	if (ret)
-		platform_device_put(pd);
-
-	return ret;
-}
-device_initcall(add_pcspkr);