MLBEDSW-3771: Updated to TF 2.4 flatbuffer schema

Updated tflite loader and mappings from tensorflow 2.3 to tensorflow 2.4

Signed-off-by: Tim Hall <tim.hall@arm.com>
Change-Id: I55884000ee139baf639bb0377008e0534f72fe94
diff --git a/ethosu/vela/tflite/CumsumOptions.py b/ethosu/vela/tflite/CumsumOptions.py
new file mode 100644
index 0000000..33e086e
--- /dev/null
+++ b/ethosu/vela/tflite/CumsumOptions.py
@@ -0,0 +1,38 @@
+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: tflite
+
+import flatbuffers
+
+class CumsumOptions(object):
+    __slots__ = ['_tab']
+
+    @classmethod
+    def GetRootAsCumsumOptions(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = CumsumOptions()
+        x.Init(buf, n + offset)
+        return x
+
+    # CumsumOptions
+    def Init(self, buf, pos):
+        self._tab = flatbuffers.table.Table(buf, pos)
+
+    # CumsumOptions
+    def Exclusive(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(4))
+        if o != 0:
+            return bool(self._tab.Get(flatbuffers.number_types.BoolFlags, o + self._tab.Pos))
+        return False
+
+    # CumsumOptions
+    def Reverse(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(6))
+        if o != 0:
+            return bool(self._tab.Get(flatbuffers.number_types.BoolFlags, o + self._tab.Pos))
+        return False
+
+def CumsumOptionsStart(builder): builder.StartObject(2)
+def CumsumOptionsAddExclusive(builder, exclusive): builder.PrependBoolSlot(0, exclusive, 0)
+def CumsumOptionsAddReverse(builder, reverse): builder.PrependBoolSlot(1, reverse, 0)
+def CumsumOptionsEnd(builder): return builder.EndObject()