dm: treewide: Rename 'platdata' variables to just 'plat'

We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/xen/pvblock.c b/drivers/xen/pvblock.c
index cbb51d2..b0c93d6 100644
--- a/drivers/xen/pvblock.c
+++ b/drivers/xen/pvblock.c
@@ -600,7 +600,7 @@
 			 lbaint_t blkcnt, void *buffer, int write)
 {
 	struct blkfront_dev *blk_dev = dev_get_priv(udev);
-	struct blk_desc *desc = dev_get_uclass_platdata(udev);
+	struct blk_desc *desc = dev_get_uclass_plat(udev);
 	struct blkfront_aiocb aiocb;
 	lbaint_t blocks_todo;
 	bool unaligned;
@@ -658,7 +658,7 @@
 
 static int pvblock_blk_bind(struct udevice *udev)
 {
-	struct blk_desc *desc = dev_get_uclass_platdata(udev);
+	struct blk_desc *desc = dev_get_uclass_plat(udev);
 	int devnum;
 
 	desc->if_type = IF_TYPE_PVBLOCK;
@@ -685,12 +685,12 @@
 static int pvblock_blk_probe(struct udevice *udev)
 {
 	struct blkfront_dev *blk_dev = dev_get_priv(udev);
-	struct blkfront_platdata *platdata = dev_get_platdata(udev);
-	struct blk_desc *desc = dev_get_uclass_platdata(udev);
+	struct blkfront_platdata *plat = dev_get_platdata(udev);
+	struct blk_desc *desc = dev_get_uclass_plat(udev);
 	int ret, devid;
 
-	devid = platdata->devid;
-	free(platdata);
+	devid = plat->devid;
+	free(plat);
 
 	ret = init_blkfront(devid, blk_dev);
 	if (ret < 0)
@@ -737,27 +737,27 @@
 {
 	struct driver_info info;
 	struct udevice *udev;
-	struct blkfront_platdata *platdata;
+	struct blkfront_platdata *plat;
 	int ret;
 
 	debug("New " DRV_NAME_BLK ", device ID %d\n", devid);
 
-	platdata = malloc(sizeof(struct blkfront_platdata));
-	if (!platdata) {
+	plat = malloc(sizeof(struct blkfront_platdata));
+	if (!plat) {
 		printf("Failed to allocate platform data\n");
 		return -ENOMEM;
 	}
 
-	platdata->devid = devid;
+	plat->devid = devid;
 
 	info.name = DRV_NAME_BLK;
-	info.platdata = platdata;
+	info.plat = plat;
 
 	ret = device_bind_by_name(parent, false, &info, &udev);
 	if (ret < 0) {
 		printf("Failed to bind " DRV_NAME_BLK " to device with ID %d, ret: %d\n",
 		       devid, ret);
-		free(platdata);
+		free(plat);
 	}
 	return ret;
 }
@@ -802,7 +802,7 @@
 	class_name = uclass_get_name(UCLASS_PVBLOCK);
 	for (blk_first_device(IF_TYPE_PVBLOCK, &udev); udev;
 	     blk_next_device(&udev), first = false) {
-		struct blk_desc *desc = dev_get_uclass_platdata(udev);
+		struct blk_desc *desc = dev_get_uclass_plat(udev);
 
 		if (!first)
 			puts(", ");