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/ram/rockchip/sdram_rk3328.c b/drivers/ram/rockchip/sdram_rk3328.c
index 634fd41..994a948 100644
--- a/drivers/ram/rockchip/sdram_rk3328.c
+++ b/drivers/ram/rockchip/sdram_rk3328.c
@@ -50,7 +50,7 @@
 #if CONFIG_IS_ENABLED(OF_PLATDATA)
 static int conv_of_platdata(struct udevice *dev)
 {
-	struct rockchip_dmc_plat *plat = dev_get_platdata(dev);
+	struct rockchip_dmc_plat *plat = dev_get_plat(dev);
 	struct dtd_rockchip_rk3328_dmc *dtplat = &plat->dtplat;
 	int ret;
 
@@ -515,7 +515,7 @@
 static int rk3328_dmc_init(struct udevice *dev)
 {
 	struct dram_info *priv = dev_get_priv(dev);
-	struct rockchip_dmc_plat *plat = dev_get_platdata(dev);
+	struct rockchip_dmc_plat *plat = dev_get_plat(dev);
 	int ret;
 
 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
@@ -551,7 +551,7 @@
 static int rk3328_dmc_ofdata_to_platdata(struct udevice *dev)
 {
 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
-	struct rockchip_dmc_plat *plat = dev_get_platdata(dev);
+	struct rockchip_dmc_plat *plat = dev_get_plat(dev);
 	int ret;
 
 	ret = dev_read_u32_array(dev, "rockchip,sdram-params",