ASoC: add DAI and platform / DMA drivers for SH SIU

Several SuperH platforms, including sh7722, sh7343, sh7354, sh7367 include
a Sound Interface Unit (SIU). This patch adds DAI and platform / DMA
drivers for this interface.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

arch/sh/include/asm/siu.h

@@ -0,0 +1,26 @@
+/*
+ * platform header for the SIU ASoC driver
+ *
+ * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * 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.
+ */
+
+#ifndef ASM_SIU_H
+#define ASM_SIU_H
+
+#include <asm/dma-sh.h>
+
+struct device;
+
+struct siu_platform {
+	struct device *dma_dev;
+	enum sh_dmae_slave_chan_id dma_slave_tx_a;
+	enum sh_dmae_slave_chan_id dma_slave_rx_a;
+	enum sh_dmae_slave_chan_id dma_slave_tx_b;
+	enum sh_dmae_slave_chan_id dma_slave_rx_b;
+};
+
+#endif /* ASM_SIU_H */