ASoC: rsnd: Remove obsolete platform data support

Since commit 3d7608e4 ("ARM: shmobile: bockw: remove legacy
board file and config"), Renesas R-Car SoCs are only supported in
generic DT-only ARM multi-platform builds.  The driver doesn't need to
use platform data anymore, hence remove platform data configuration.

Move <sound/rcar_snd.h> to sound/soc/sh/rcar/, as it's no longer needed
by platform code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -1236,20 +1236,11 @@ static int rsnd_probe(struct platform_device *pdev)
 	};
 	int ret, i;
 
-	info = NULL;
-	of_data = NULL;
-	if (of_id) {
-		info = devm_kzalloc(&pdev->dev,
-				    sizeof(struct rcar_snd_info), GFP_KERNEL);
+	info = devm_kzalloc(&pdev->dev, sizeof(struct rcar_snd_info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
 	of_data = of_id->data;
-	} else {
-		info = pdev->dev.platform_data;
-	}
-
-	if (!info) {
-		dev_err(dev, "driver needs R-Car sound information\n");
-		return -ENODEV;
-	}
 
 	/*
 	 *	init priv data

sound/soc/sh/rcar/rsnd.h

@@ -21,10 +21,11 @@
 #include <linux/of_irq.h>
 #include <linux/sh_dma.h>
 #include <linux/workqueue.h>
-#include <sound/rcar_snd.h>
 #include <sound/soc.h>
 #include <sound/pcm_params.h>
 
+#include "rcar_snd.h"
+
 /*
  *	pseudo register
  *

sound/soc/sh/rcar/ssi.c

@@ -700,9 +700,6 @@ static void rsnd_of_parse_ssi(struct platform_device *pdev,
 	struct device *dev = &pdev->dev;
 	int nr, i;
 
-	if (!of_data)
-		return;
-
 	node = rsnd_ssi_of_node(priv);
 	if (!node)
 		return;