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/drivers/net/octeontx2/nix.c b/drivers/net/octeontx2/nix.c
index 0a3e8e4..9649b39 100644
--- a/drivers/net/octeontx2/nix.c
+++ b/drivers/net/octeontx2/nix.c
@@ -727,7 +727,7 @@
 {
 	struct rvu_pf *rvu = dev_get_priv(dev);
 	struct nix *nix = rvu->nix;
-	struct eth_pdata *pdata = dev_get_platdata(dev);
+	struct eth_pdata *pdata = dev_get_plat(dev);
 
 	/* If lower level firmware fails to set proper MAC
 	 * u-boot framework updates MAC to random address.