fdt: Drop fdt_select.py

This file was used to select between the normal and fallback libfdt
implementations. Now that we only have one, it is not needed.

Drop it and fix up all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtoc/fdt.py b/tools/dtoc/fdt.py
index bff31d1..63a32ea 100644
--- a/tools/dtoc/fdt.py
+++ b/tools/dtoc/fdt.py
@@ -14,8 +14,8 @@
 
 # This deals with a device tree, presenting it as an assortment of Node and
 # Prop objects, representing nodes and properties, respectively. This file
-# contains the base classes and defines the high-level API. See fdt_select.py
-# for how to create an Fdt object.
+# contains the base classes and defines the high-level API. You can use
+# FdtScan() as a convenience function to create and scan an Fdt.
 
 # This implementation uses a libfdt Python library to access the device tree,
 # so it is fairly efficient.
@@ -400,3 +400,9 @@
         """
         node = Node(fdt, offset, name, path)
         return node
+
+def FdtScan(fname):
+    """Returns a new Fdt object from the implementation we are using"""
+    dtb = Fdt(fname)
+    dtb.Scan()
+    return dtb