avr32: Rename at32ap.c -> pdc.c

The only thing left in at32ap.c is some PDC stuff. Rename the file to
reflect what it actually does.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/mach-at32ap/pdc.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * 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/err.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+static int __init pdc_probe(struct platform_device *pdev)
+{
+	struct clk *pclk, *hclk;
+
+	pclk = clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(pclk)) {
+		dev_err(&pdev->dev, "no pclk defined\n");
+		return PTR_ERR(pclk);
+	}
+	hclk = clk_get(&pdev->dev, "hclk");
+	if (IS_ERR(hclk)) {
+		dev_err(&pdev->dev, "no hclk defined\n");
+		clk_put(pclk);
+		return PTR_ERR(hclk);
+	}
+
+	clk_enable(pclk);
+	clk_enable(hclk);
+
+	dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
+	return 0;
+}
+
+static struct platform_driver pdc_driver = {
+	.probe		= pdc_probe,
+	.driver		= {
+		.name	= "pdc",
+	},
+};
+
+static int __init pdc_init(void)
+{
+	return platform_driver_register(&pdc_driver);
+}
+arch_initcall(pdc_init);