COMPMID-3241: Add Layer Normalization to NEQLSTMLayer

- Add output quantization calculation to Layer Normalization
- Add members for Layer Normalization to NEQLSTMLayer
- Add configure/validate/run of Layer Normalization to NEQLSTMLayer

Change-Id: I278c8e0edbb21212f3afa4d4a336df0f1a4c1bfb
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3059
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEQLSTMLayerNormalizationKernel.h b/arm_compute/core/NEON/kernels/NEQLSTMLayerNormalizationKernel.h
index 631de66..f5e8da7 100644
--- a/arm_compute/core/NEON/kernels/NEQLSTMLayerNormalizationKernel.h
+++ b/arm_compute/core/NEON/kernels/NEQLSTMLayerNormalizationKernel.h
@@ -130,6 +130,8 @@
                             const int16_t *weight_ptr,
                             const int32_t *bias_ptr,
                             int32_t mean, int32_t inv_std_mul, int32_t inv_std_shift);
+    /** Function to compute output quantization information */
+    QuantizationInfo compute_output_qinfo();
 };
 } // namespace arm_compute
 #endif /* ARM_COMPUTE_NEQLSTMLAYERNORMALIZATIONKERNEL_H */