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/spi/pl022_spi.c b/drivers/spi/pl022_spi.c
index 712385b..3d14203 100644
--- a/drivers/spi/pl022_spi.c
+++ b/drivers/spi/pl022_spi.c
@@ -89,7 +89,7 @@
 
 static int pl022_spi_probe(struct udevice *bus)
 {
-	struct pl022_spi_pdata *plat = dev_get_platdata(bus);
+	struct pl022_spi_pdata *plat = dev_get_plat(bus);
 	struct pl022_spi_slave *ps = dev_get_priv(bus);
 
 	ps->base = ioremap(plat->addr, plat->size);