pylibfdt: Allow version normalization to fail

In some cases, we might not have the sic portion of setuputils
available. Make our import and use of this be done in try/except blocks
as this is done to suppress a run-time warning that is otherwise
non-fatal.

[Backport of commit 051f409d25 ("pylibfdt: Allow version normalization
 to fail")]

Reported-by: Pali Rohár <pali@kernel.org>
Fixes: 1416591876 ("pylibfdt: Fix disable version normalization")
Signed-off-by: Tom Rini <trini@konsulko.com>
Change-Id: Id6f31b1a7b320a0e512deccc50cdc689751f3705
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/293272
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
Tested-by: Patrick DELAUNAY <patrick.delaunay@foss.st.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@foss.st.com>
Domain-Review: Patrick DELAUNAY <patrick.delaunay@foss.st.com>

scripts/dtc/pylibfdt/setup.py

@@ -20,12 +20,17 @@ allows this script to be run stand-alone, e.g.:
     ./pylibfdt/setup.py install [--prefix=...]
 """
 
-from setuptools import setup, Extension, sic
+from setuptools import setup, Extension
 from setuptools.command.build_py import build_py as _build_py
 import os
 import re
 import sys
 
+try:
+    from setuptools import sic
+except ImportError:
+    pass
+
 srcdir = os.path.dirname(__file__)
 
 with open(os.path.join(srcdir, "../README"), "r") as fh:
@@ -113,7 +118,10 @@ progname = sys.argv[0]
 files = os.environ.get('SOURCES', '').split()
 cflags = os.environ.get('CPPFLAGS', '').split()
 objdir = os.environ.get('OBJDIR')
-version = os.environ.get('VERSION')
+try:
+    version = sic(os.environ.get('VERSION'))
+except:
+    version = os.environ.get('VERSION')
 swig_opts = os.environ.get('SWIG_OPTS', '').split()
 
 # If we were called directly rather than through our Makefile (which is often
@@ -137,7 +145,7 @@ class build_py(_build_py):
 
 setup(
     name='libfdt',
-    version=sic(version),
+    version=version,
     cmdclass = {'build_py' : build_py},
     author='Simon Glass',
     author_email='sjg@chromium.org',