dm: Use access methods for dev/uclass private data

Most drivers use these access methods but a few do not. Update them.

In some cases the access is not permitted, so mark those with a FIXME tag
for the maintainer to check.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
diff --git a/drivers/pinctrl/pinctrl-qe-io.c b/drivers/pinctrl/pinctrl-qe-io.c
index 690e5c7..e129ab2 100644
--- a/drivers/pinctrl/pinctrl-qe-io.c
+++ b/drivers/pinctrl/pinctrl-qe-io.c
@@ -122,7 +122,7 @@
 #else
 static int qe_io_of_to_plat(struct udevice *dev)
 {
-	struct qe_io_plat *plat = dev->plat;
+	struct qe_io_plat *plat = dev_get_plat(dev);
 	fdt_addr_t addr;
 
 	addr = dev_read_addr(dev);
@@ -143,7 +143,7 @@
  */
 static int par_io_of_config_node(struct udevice *dev, ofnode pio)
 {
-	struct qe_io_plat *plat = dev->plat;
+	struct qe_io_plat *plat = dev_get_plat(dev);
 	qepio83xx_t *par_io = plat->base;
 	const unsigned int *pio_map;
 	int pio_map_len;