BaseTools: Remove equality operator with None

replace "== None" with "is None" and "!= None" with "is not None"

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

BaseTools/Source/Python/UPT/Parser/InfDepexSectionParser.py

@@ -87,7 +87,7 @@ class InfDepexSectionParser(InfParserSectionRoot):
         ReFormatComment = re.compile(r"""#(?:\s*)\[(.*?)\](?:.*)""", re.DOTALL)
         for CommentItem in DepexComment:
             CommentContent = CommentItem[0]
-            if ReFormatComment.match(CommentContent) != None:
+            if ReFormatComment.match(CommentContent) is not None:
                 FormatCommentLn = CommentItem[1] + 1
                 continue