dm: treewide: Rename dev_get_platdata() to dev_get_plat()

Rename this to be consistent with the change from 'platdata'.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/demo.c b/cmd/demo.c
index 90d3cff..78a55f7 100644
--- a/cmd/demo.c
+++ b/cmd/demo.c
@@ -74,7 +74,7 @@
 		printf("entry %d - instance %08x, ops %08x, plat %08x\n",
 		       i++, (uint)map_to_sysmem(dev),
 		       (uint)map_to_sysmem(dev->driver->ops),
-		       (uint)map_to_sysmem(dev_get_platdata(dev)));
+		       (uint)map_to_sysmem(dev_get_plat(dev)));
 	}
 
 	return cmd_process_error(cmdtp, ret);
diff --git a/cmd/host.c b/cmd/host.c
index ff119da..1d21f79 100644
--- a/cmd/host.c
+++ b/cmd/host.c
@@ -91,7 +91,7 @@
 		struct host_block_dev *host_dev;
 
 #ifdef CONFIG_BLK
-		host_dev = dev_get_platdata(blk_dev->bdev);
+		host_dev = dev_get_plat(blk_dev->bdev);
 #else
 		host_dev = blk_dev->priv;
 #endif