cros: Adjust board_get_cros_ec_dev() to return a udevice

Rather than returning what is effectively an internal data structure,
return the cros EC device itself.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/cros_ec.c

@@ -13,7 +13,7 @@
 #include <dm.h>
 #include <errno.h>
 
-struct cros_ec_dev *board_get_cros_ec_dev(void)
+struct udevice *board_get_cros_ec_dev(void)
 {
 	struct udevice *dev;
 	int ret;
@@ -23,7 +23,7 @@ struct cros_ec_dev *board_get_cros_ec_dev(void)
 		debug("%s: Error %d\n", __func__, ret);
 		return NULL;
 	}
-	return dev_get_uclass_priv(dev);
+	return dev;
 }
 
 int cros_ec_get_error(void)

include/cros_ec.h

@@ -208,11 +208,9 @@ int cros_ec_flash_update_rw(struct udevice *dev, const uint8_t  *image,
 /**
  * Return a pointer to the board's CROS-EC device
  *
- * This should be implemented by board files.
- *
  * @return pointer to CROS-EC device, or NULL if none is available
  */
-struct cros_ec_dev *board_get_cros_ec_dev(void);
+struct udevice *board_get_cros_ec_dev(void);
 
 struct dm_cros_ec_ops {
 	int (*check_version)(struct udevice *dev);