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/usb/host/ehci-vf.c b/drivers/usb/host/ehci-vf.c
index a517c61..e0e4f84 100644
--- a/drivers/usb/host/ehci-vf.c
+++ b/drivers/usb/host/ehci-vf.c
@@ -312,7 +312,7 @@
 
 static int ehci_usb_probe(struct udevice *dev)
 {
-	struct usb_platdata *plat = dev_get_plat(dev);
+	struct usb_plat *plat = dev_get_plat(dev);
 	struct ehci_vf_priv_data *priv = dev_get_priv(dev);
 	struct usb_ehci *ehci = priv->ehci;
 	struct ehci_hccr *hccr;
@@ -355,7 +355,7 @@
 	.remove = ehci_deregister,
 	.ops = &ehci_usb_ops,
 	.of_to_plat = vf_usb_of_to_plat,
-	.plat_auto	= sizeof(struct usb_platdata),
+	.plat_auto	= sizeof(struct usb_plat),
 	.priv_auto	= sizeof(struct ehci_vf_priv_data),
 	.flags = DM_FLAG_ALLOC_PRIV_DMA,
 };