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/clk/clk_fixed_factor.c b/drivers/clk/clk_fixed_factor.c
index 7a9d423..d68f79d 100644
--- a/drivers/clk/clk_fixed_factor.c
+++ b/drivers/clk/clk_fixed_factor.c
@@ -18,7 +18,7 @@
 };
 
 #define to_clk_fixed_factor(dev)	\
-	((struct clk_fixed_factor *)dev_get_platdata(dev))
+	((struct clk_fixed_factor *)dev_get_plat(dev))
 
 static ulong clk_fixed_factor_get_rate(struct clk *clk)
 {