dm: treewide: Rename 'platdata' variables to just 'plat'

We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/clk/rockchip/clk_rk3288.c b/drivers/clk/rockchip/clk_rk3288.c
index 7c91e00..0263883 100644
--- a/drivers/clk/rockchip/clk_rk3288.c
+++ b/drivers/clk/rockchip/clk_rk3288.c
@@ -1041,7 +1041,7 @@
 	.id		= UCLASS_CLK,
 	.of_match	= rk3288_clk_ids,
 	.priv_auto	= sizeof(struct rk3288_clk_priv),
-	.platdata_auto	= sizeof(struct rk3288_clk_plat),
+	.plat_auto	= sizeof(struct rk3288_clk_plat),
 	.ops		= &rk3288_clk_ops,
 	.bind		= rk3288_clk_bind,
 	.ofdata_to_platdata	= rk3288_clk_ofdata_to_platdata,