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/BuiltinOptions.py b/ethosu/vela/tflite/BuiltinOptions.py
index 6be2d43..d807696 100644
--- a/ethosu/vela/tflite/BuiltinOptions.py
+++ b/ethosu/vela/tflite/BuiltinOptions.py
@@ -106,4 +106,12 @@
     SegmentSumOptions = 100
     BatchMatMulOptions = 101
     CumsumOptions = 102
+    CallOnceOptions = 103
+    BroadcastToOptions = 104
+    Rfft2dOptions = 105
+    Conv3DOptions = 106
+    HashtableOptions = 107
+    HashtableFindOptions = 108
+    HashtableImportOptions = 109
+    HashtableSizeOptions = 110