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/adc/stm32-adc.c b/drivers/adc/stm32-adc.c
index 2c6984f..ad8d1a3 100644
--- a/drivers/adc/stm32-adc.c
+++ b/drivers/adc/stm32-adc.c
@@ -80,7 +80,7 @@
 
 static int stm32_adc_start_channel(struct udevice *dev, int channel)
 {
-	struct adc_uclass_platdata *uc_pdata = dev_get_uclass_platdata(dev);
+	struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
 	struct stm32_adc_common *common = dev_get_priv(dev_get_parent(dev));
 	struct stm32_adc *adc = dev_get_priv(dev);
 	int ret;
@@ -164,7 +164,7 @@
 
 static int stm32_adc_chan_of_init(struct udevice *dev)
 {
-	struct adc_uclass_platdata *uc_pdata = dev_get_uclass_platdata(dev);
+	struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
 	struct stm32_adc *adc = dev_get_priv(dev);
 	u32 chans[STM32_ADC_CH_MAX];
 	unsigned int i, num_channels;
@@ -206,7 +206,7 @@
 
 static int stm32_adc_probe(struct udevice *dev)
 {
-	struct adc_uclass_platdata *uc_pdata = dev_get_uclass_platdata(dev);
+	struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
 	struct stm32_adc_common *common = dev_get_priv(dev_get_parent(dev));
 	struct stm32_adc *adc = dev_get_priv(dev);
 	int offset;