dm: treewide: Rename ..._platdata variables to just ..._plat

Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 620d094..dfbbf8a 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -456,7 +456,7 @@
 
 static int virtio_pci_probe(struct udevice *udev)
 {
-	struct pci_child_platdata *pplat = dev_get_parent_plat(udev);
+	struct pci_child_plat *pplat = dev_get_parent_plat(udev);
 	struct virtio_dev_priv *uc_priv = dev_get_uclass_priv(udev);
 	struct virtio_pci_priv *priv = dev_get_priv(udev);
 	u16 subvendor;