MLBEDSW-4854: Update to TensorFlow 2.5

This commit updates the flatbuffers generated code
to comply with TensorFlow 2.5, as well as stripping
away some legacy code.

Signed-off-by: Dwight Lidman <dwight.lidman@arm.com>
Change-Id: I01fe47ec2bde6e78fdde21ee1bc0a71f560c53ae
diff --git a/ethosu/vela/tflite/HashtableOptions.py b/ethosu/vela/tflite/HashtableOptions.py
new file mode 100644
index 0000000..646085f
--- /dev/null
+++ b/ethosu/vela/tflite/HashtableOptions.py
@@ -0,0 +1,50 @@
+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: tflite
+
+import flatbuffers
+
+class HashtableOptions(object):
+    __slots__ = ['_tab']
+
+    @classmethod
+    def GetRootAsHashtableOptions(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = HashtableOptions()
+        x.Init(buf, n + offset)
+        return x
+
+    @classmethod
+    def HashtableOptionsBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x54\x46\x4C\x33", size_prefixed=size_prefixed)
+
+    # HashtableOptions
+    def Init(self, buf, pos):
+        self._tab = flatbuffers.table.Table(buf, pos)
+
+    # HashtableOptions
+    def TableId(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(4))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Int32Flags, o + self._tab.Pos)
+        return 0
+
+    # HashtableOptions
+    def KeyDtype(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(6))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Int8Flags, o + self._tab.Pos)
+        return 0
+
+    # HashtableOptions
+    def ValueDtype(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(8))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Int8Flags, o + self._tab.Pos)
+        return 0
+
+def HashtableOptionsStart(builder): builder.StartObject(3)
+def HashtableOptionsAddTableId(builder, tableId): builder.PrependInt32Slot(0, tableId, 0)
+def HashtableOptionsAddKeyDtype(builder, keyDtype): builder.PrependInt8Slot(1, keyDtype, 0)
+def HashtableOptionsAddValueDtype(builder, valueDtype): builder.PrependInt8Slot(2, valueDtype, 0)
+def HashtableOptionsEnd(builder): return builder.EndObject()