Add FFT2d and RFFT2d serialization support

Signed-off-by: Luke Hutton <luke.hutton@arm.com>
Change-Id: I79b3684ae1cf24e71ec7098ed7db5be5bc2f6fb2
diff --git a/python/serializer/tosa_serializer.py b/python/serializer/tosa_serializer.py
index 8f70fb0..e8311ce 100644
--- a/python/serializer/tosa_serializer.py
+++ b/python/serializer/tosa_serializer.py
@@ -361,6 +361,14 @@
         self.ints.append((a.AddInput1Zp, input1_zp))
         self.ints.append((a.AddOutputZp, output_zp))
 
+    def FFTAttribute(self, inverse):
+        from tosa import FFTAttribute as a, Attribute
+
+        self.utype = Attribute.Attribute().FFTAttribute
+        self.optFcns = (a.Start, a.End)
+
+        self.bools.append((a.AddInverse, inverse))
+
 
 class TosaSerializerTensor:
     def __init__(