of/device: Replace struct of_device with struct platform_device

of_device is just an alias for platform_device, so remove it entirely.  Also
replace to_of_device() with to_platform_device() and update comment blocks.

This patch was initially generated from the following semantic patch, and then
edited by hand to pick up the bits that coccinelle didn't catch.

@@
@@
-struct of_device
+struct platform_device

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: David S. Miller <davem@davemloft.net>
diff --git a/sound/sparc/dbri.c b/sound/sparc/dbri.c
index c421901..39cd5d6 100644
--- a/sound/sparc/dbri.c
+++ b/sound/sparc/dbri.c
@@ -299,7 +299,7 @@
 /* This structure holds the information for both chips (DBRI & CS4215) */
 struct snd_dbri {
 	int regs_size, irq;	/* Needed for unload */
-	struct of_device *op;	/* OF device info */
+	struct platform_device *op;	/* OF device info */
 	spinlock_t lock;
 
 	struct dbri_dma *dma;	/* Pointer to our DMA block */
@@ -2523,7 +2523,7 @@
 static void snd_dbri_free(struct snd_dbri *dbri);
 
 static int __devinit snd_dbri_create(struct snd_card *card,
-				     struct of_device *op,
+				     struct platform_device *op,
 				     int irq, int dev)
 {
 	struct snd_dbri *dbri = card->private_data;
@@ -2592,7 +2592,7 @@
 				  (void *)dbri->dma, dbri->dma_dvma);
 }
 
-static int __devinit dbri_probe(struct of_device *op, const struct of_device_id *match)
+static int __devinit dbri_probe(struct platform_device *op, const struct of_device_id *match)
 {
 	struct snd_dbri *dbri;
 	struct resource *rp;
@@ -2662,7 +2662,7 @@
 	return err;
 }
 
-static int __devexit dbri_remove(struct of_device *op)
+static int __devexit dbri_remove(struct platform_device *op)
 {
 	struct snd_card *card = dev_get_drvdata(&op->dev);