Add ERROR_IF checks to operators without specific ERROR_IFs

 * Operators implemented: sigmoid, tanh, arthmetic_right_shift,
mul, table, select, equal, greater, greater_equal, concat, reverse,
tile, scatter, gather, case
 * Note that over the course of implementation some specific ERROR_IF
checks have been added for some of the above operators

Change-Id: I80595e6eb9a3e5efd1cc6fd7aa28bbc2dd614980
Signed-off-by: Matthew Haddon <matthew.haddon@arm.com>
Signed-off-by: Les Bell <les.bell@arm.com>
Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
diff --git a/verif/tosa_error_if.py b/verif/tosa_error_if.py
index 93a35b3..9fcc374 100644
--- a/verif/tosa_error_if.py
+++ b/verif/tosa_error_if.py
@@ -53,5 +53,8 @@
     InputSizeStartLengthMismatch = "InputSizeStartLengthMismatch"
     IndexOutsideBounds = "IndexOutsideBounds"
     IndexUsedTwice = "IndexUsedTwice"
+    MaxSmallerMin = "MaxSmallerMin"
+    ConcatInputRankMismatch = "ConcatInputRankMismatch"
+    ConcatInputDimMismatch = "ConcatInputDimMismatch"