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/misc/fs_loader.c b/drivers/misc/fs_loader.c
index 71e20a4..b149a27 100644
--- a/drivers/misc/fs_loader.c
+++ b/drivers/misc/fs_loader.c
@@ -161,7 +161,7 @@
 		else
 			ret = -ENODEV;
 	} else {
-		ret = select_fs_dev(dev->platdata);
+		ret = select_fs_dev(dev->plat);
 	}
 
 	if (ret)
@@ -228,7 +228,7 @@
 	if (ofnode_valid(fs_loader_node)) {
 		struct device_platdata *plat;
 
-		plat = dev->platdata;
+		plat = dev->plat;
 		if (!ofnode_read_u32_array(fs_loader_node,
 					  "phandlepart",
 					  phandlepart, 2)) {
@@ -250,7 +250,7 @@
 {
 #if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(BLK)
 	int ret;
-	struct device_platdata *plat = dev->platdata;
+	struct device_platdata *plat = dev->plat;
 
 	if (plat->phandlepart.phandle) {
 		ofnode node = ofnode_get_by_phandle(plat->phandlepart.phandle);
@@ -285,7 +285,7 @@
 	.of_match		= fs_loader_ids,
 	.probe			= fs_loader_probe,
 	.ofdata_to_platdata	= fs_loader_ofdata_to_platdata,
-	.platdata_auto	= sizeof(struct device_platdata),
+	.plat_auto	= sizeof(struct device_platdata),
 	.priv_auto	= sizeof(struct firmware),
 };