binman: Incorporate entry documentation

Update this to avoid sphinx warnings and incorporate it into the new
documentaiton tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/setup.py b/tools/binman/setup.py
index 2dad43d..5ed94ab 100644
--- a/tools/binman/setup.py
+++ b/tools/binman/setup.py
@@ -7,6 +7,6 @@
       scripts=['binman'],
       packages=['binman', 'binman.etype'],
       package_dir={'binman': ''},
-      package_data={'binman': ['README.rst', 'README.entries']},
+      package_data={'binman': ['README.rst', 'entries.rst']},
       classifiers=['Environment :: Console',
                    'Topic :: Software Development :: Embedded Systems'])