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/drivers/media/video/fsl-viu.c b/drivers/media/video/fsl-viu.c
index 8f1c94f..43d208f 100644
--- a/drivers/media/video/fsl-viu.c
+++ b/drivers/media/video/fsl-viu.c
@@ -1418,7 +1418,7 @@
 	.current_norm   = V4L2_STD_NTSC_M,
 };
 
-static int __devinit viu_of_probe(struct of_device *op,
+static int __devinit viu_of_probe(struct platform_device *op,
 				  const struct of_device_id *match)
 {
 	struct viu_dev *viu_dev;
@@ -1549,7 +1549,7 @@
 	return ret;
 }
 
-static int __devexit viu_of_remove(struct of_device *op)
+static int __devexit viu_of_remove(struct platform_device *op)
 {
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
 	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
@@ -1570,7 +1570,7 @@
 }
 
 #ifdef CONFIG_PM
-static int viu_suspend(struct of_device *op, pm_message_t state)
+static int viu_suspend(struct platform_device *op, pm_message_t state)
 {
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
 	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
@@ -1579,7 +1579,7 @@
 	return 0;
 }
 
-static int viu_resume(struct of_device *op)
+static int viu_resume(struct platform_device *op)
 {
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
 	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);