patman: Convert camel case in test_util.py

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtoc/main.py b/tools/dtoc/main.py
index 276cfad..fac9db9 100755
--- a/tools/dtoc/main.py
+++ b/tools/dtoc/main.py
@@ -55,17 +55,17 @@
 
     test_dtoc.setup()
 
-    test_util.RunTestSuites(
+    test_util.run_test_suites(
         result, debug=True, verbosity=1, test_preserve_dirs=False,
         processes=processes, test_name=test_name, toolpath=[],
         class_and_module_list=[test_dtoc.TestDtoc,test_src_scan.TestSrcScan])
 
-    return test_util.ReportResult('binman', test_name, result)
+    return test_util.report_result('binman', test_name, result)
 
 def RunTestCoverage():
     """Run the tests and check that we get 100% coverage"""
     sys.argv = [sys.argv[0]]
-    test_util.RunTestCoverage('tools/dtoc/dtoc', '/main.py',
+    test_util.run_test_coverage('tools/dtoc/dtoc', '/main.py',
             ['tools/patman/*.py', '*/fdt*', '*test*'], args.build_dir)