ARM: OMAP2+: Add quirk support for legacy platform data init

We want to drop the board-*.c files but keep things working.
Let's make it a bit easier to support legacy platform data
init with quirks. This also keeps board-generic.c clean from
board specific hacks.

For now, the quirks table is empty, that is populated
in the later patches.

Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/pdata-quirks.c

@@ -0,0 +1,39 @@
+/*
+ * Legacy platform_data quirks
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * 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/clk.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include "common.h"
+#include "common-board-devices.h"
+#include "dss-common.h"
+
+struct pdata_init {
+	const char *compatible;
+	void (*fn)(void);
+};
+
+static struct pdata_init pdata_quirks[] __initdata = {
+	{ /* sentinel */ },
+};
+
+void __init pdata_quirks_init(void)
+{
+	struct pdata_init *quirks = pdata_quirks;
+
+	while (quirks->compatible) {
+		if (of_machine_is_compatible(quirks->compatible)) {
+			if (quirks->fn)
+				quirks->fn();
+			break;
+		}
+		quirks++;
+	}
+}