COMPMID-444: Add support for QS8/QS16 NEON Arithmetic Add/Sub/Mul.

Change-Id: Ia482498688ca1884272b5062e3415e736e03d36f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/80448
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/arm_compute/core/NEON/NEFixedPoint.inl b/arm_compute/core/NEON/NEFixedPoint.inl
index 4e862ba..05e4815 100644
--- a/arm_compute/core/NEON/NEFixedPoint.inl
+++ b/arm_compute/core/NEON/NEFixedPoint.inl
@@ -181,6 +181,11 @@
     return vld1q_dup_s16(addr);
 }
 
+inline qint16x8x2_t vld2q_qs16(const qint16_t *addr)
+{
+    return vld2q_s16(addr);
+}
+
 inline void vst1_qs8(qint8_t *addr, qint8x8_t b)
 {
     vst1_s8(addr, b);