pylibfdt: fix Python version

In commit "pylibfdt: Remove some apparently deprecated options from
setup.py" the scm version tracking was removed. But it was not replaced
with the fixed version. This causes the Python modules to be installed
as version '0.0.0'.

Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

setup.py

@@ -52,6 +52,7 @@ class build_py(_build_py):
 
 setup(
     name='libfdt',
+    version=version,
     cmdclass = {'build_py' : build_py},
     author='Simon Glass',
     author_email='sjg@chromium.org',
@@ -72,5 +73,4 @@ setup(
         "License :: OSI Approved :: GNU General Public License v2 or later (GPLv2+)",
         "Operating System :: OS Independent",
     ],
-
 )