Fix v7 test failure when core matmul result is dequantized into fp32

Partially Resolves: ONCPUML-1444, MLINFSW-439

Change-Id: Ic7498d6944df2848f3e82eaf4e11cc5cb6ef5754
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/11424
Reviewed-by: Anitha Raj <Anitha.Raj@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/NEON/GEMMLowp.cpp b/tests/validation/NEON/GEMMLowp.cpp
index 1231c21..9b1da61 100644
--- a/tests/validation/NEON/GEMMLowp.cpp
+++ b/tests/validation/NEON/GEMMLowp.cpp
@@ -53,7 +53,6 @@
 {
     constexpr AbsoluteTolerance<float> tolerance_batched(1);
     constexpr AbsoluteTolerance<float> tolerance_quant(1);
-    constexpr AbsoluteTolerance<float> tolerance_dequantized(0.01f);
 } // namespace
 
 
@@ -357,7 +356,10 @@
 }
 TEST_SUITE_END() // DynamicQuantization
 
+#ifdef __aarch64__
+// Deqaunt tests involve returning F32 from the MatrixMultiplyCore kernels and is only implemented in aarch64
 TEST_SUITE(Dequant)
+constexpr AbsoluteTolerance<float> tolerance_dequantized(0.01f);
 FIXTURE_DATA_TEST_CASE(RunSmall, NEGEMMLowpDequantizedMatrixMultiplyValidationFixture, framework::DatasetMode::ALL, datasets::SmallGEMMLowpDataset())
 {
     // Validate output
@@ -370,6 +372,7 @@
     validate(Accessor(_target), _reference, tolerance_dequantized);
 }
 TEST_SUITE_END() // Dequant
+#endif // __aarch64__
 
 TEST_SUITE_END() // MatrixMultiplyCore
 TEST_SUITE_END() // GEMMLowp