dm: convert device_get_global_by_of_offset() to device_get_global_by_ofnode()

Also add device_find_global_by_ofnode() that also find a device based on
the OF node, but doesn't probe the device.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/include/dm/device.h b/include/dm/device.h
index 49078bc..3120b68 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -473,18 +473,33 @@
 				  struct udevice **devp);
 
 /**
- * device_get_global_by_of_offset() - Get a device based on FDT offset
+ * device_find_global_by_ofnode() - Get a device based on ofnode
  *
- * Locates a device by its device tree offset, searching globally throughout
+ * Locates a device by its device tree ofnode, searching globally throughout
+ * the all driver model devices.
+ *
+ * The device is NOT probed
+ *
+ * @node: Device tree ofnode to find
+ * @devp: Returns pointer to device if found, otherwise this is set to NULL
+ * @return 0 if OK, -ve on error
+ */
+
+int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
+
+/**
+ * device_get_global_by_ofnode() - Get a device based on ofnode
+ *
+ * Locates a device by its device tree ofnode, searching globally throughout
  * the all driver model devices.
  *
  * The device is probed to activate it ready for use.
  *
- * @of_offset: Device tree offset to find
+ * @node: Device tree ofnode to find
  * @devp: Returns pointer to device if found, otherwise this is set to NULL
  * @return 0 if OK, -ve on error
  */
-int device_get_global_by_of_offset(int of_offset, struct udevice **devp);
+int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
 
 /**
  * device_find_first_child() - Find the first child of a device