dm: treewide: Rename ..._platdata variables to just ..._plat

Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/meson/meson_plane.c b/drivers/video/meson/meson_plane.c
index 313c013..e3f784e 100644
--- a/drivers/video/meson/meson_plane.c
+++ b/drivers/video/meson/meson_plane.c
@@ -100,7 +100,7 @@
 
 void meson_vpu_setup_plane(struct udevice *dev, bool is_interlaced)
 {
-	struct video_uc_platdata *uc_plat = dev_get_uclass_plat(dev);
+	struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	struct meson_vpu_priv *priv = dev_get_priv(dev);
 	u32 osd1_ctrl_stat;
diff --git a/drivers/video/meson/meson_vpu.c b/drivers/video/meson/meson_vpu.c
index b5614fa..ca6933a 100644
--- a/drivers/video/meson/meson_vpu.c
+++ b/drivers/video/meson/meson_vpu.c
@@ -43,7 +43,7 @@
 
 static int meson_vpu_setup_mode(struct udevice *dev, struct udevice *disp)
 {
-	struct video_uc_platdata *uc_plat = dev_get_uclass_plat(dev);
+	struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	struct display_timing timing;
 	bool is_cvbs = false;
@@ -138,7 +138,7 @@
 
 static int meson_vpu_bind(struct udevice *dev)
 {
-	struct video_uc_platdata *plat = dev_get_uclass_plat(dev);
+	struct video_uc_plat *plat = dev_get_uclass_plat(dev);
 
 	plat->size = VPU_MAX_WIDTH * VPU_MAX_HEIGHT *
 		(1 << VPU_MAX_LOG2_BPP) / 8;