TOSA: Added RESHAPE, SLICE and CONCAT

Added support for Data layout ops
RESHAPE, SLICE and CONCAT.
-No support for bool_t
-Support limited to Rank <= 4 and N = 1

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: I487ac494b6506a2a6ba947ee758aa193194dd796
diff --git a/ethosu/vela/operation_util.py b/ethosu/vela/operation_util.py
index 4a4fd33..0fbed46 100644
--- a/ethosu/vela/operation_util.py
+++ b/ethosu/vela/operation_util.py
@@ -44,6 +44,12 @@
     return op
 
 
+def create_add_nop(name: str) -> Operation:
+    op = Operation(Op.Add, name)
+    op.run_on_npu = True
+    return op
+
+
 def create_depthwise_maxpool(
     name: str,
     ifm: Tensor,