COMPMID-2267: Implement NEG for CL

Change-Id: I5019103987c92df5080809201feb9b646fae8cc5
Signed-off-by: Usama Arif <usama.arif@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1130
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/utils/TypePrinter.h b/utils/TypePrinter.h
index b22e068..62edea3 100644
--- a/utils/TypePrinter.h
+++ b/utils/TypePrinter.h
@@ -1516,6 +1516,9 @@
         case ElementWiseUnary::EXP:
             os << "EXP";
             break;
+        case ElementWiseUnary::NEG:
+            os << "NEG";
+            break;
         default:
             ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
     }