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>

drivers/reset/reset-sifive.c

@@ -9,6 +9,7 @@
 #include <reset-uclass.h>
 #include <asm/io.h>
 #include <dm/device_compat.h>
+#include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <linux/bitops.h>
 
@@ -97,7 +98,7 @@ int sifive_reset_bind(struct udevice *dev, ulong count)
 	}
 	priv = malloc(sizeof(struct sifive_reset_priv));
 	priv->nr_reset = count;
-	rst_dev->priv = priv;
+	dev_set_priv(rst_dev, priv);
 
 	return 0;
 }