Implement and add unit tests for MUL and ARITHMETIC_RIGHT_SHIFT
add .clang-format
Add expected failure for RESIZE and RESCALE unit tests

Signed-off-by: Kevin Cheng <kevin.cheng@arm.com>
Change-Id: I33c8afdc8998e8518f2b0e5fabddd36ce3aa2ee9
diff --git a/serialization/tosa.fbs b/serialization/tosa.fbs
index 841cf3d..f57d9dc 100644
--- a/serialization/tosa.fbs
+++ b/serialization/tosa.fbs
@@ -167,7 +167,8 @@
   ResizeAttribute,
   ClampAttribute,
   RescaleAttribute,
-  CustomAttribute,
+  MulAttribute,
+  ArithmeticRightShiftAttribute,
   CondIfAttribute,
   WhileLoopAttribute,
 }
@@ -238,8 +239,12 @@
   per_channel: bool;
 }
 
-table CustomAttribute {
-  identifier: string;
+table MulAttribute {
+  shift: int32;
+}
+
+table ArithmeticRightShiftAttribute {
+  round: bool;
 }
 
 table CondIfAttribute {