COMPMID-428: Port NESoftmaxLayer to 16-bit fixed point.

Change-Id: I65122950bab9124b9758c27096c0f458b77aeabb
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/79365
Reviewed-by: Moritz Pflanzer <moritz.pflanzer@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Steven Niu <steven.niu@arm.com>
diff --git a/arm_compute/core/NEON/NEFixedPoint.h b/arm_compute/core/NEON/NEFixedPoint.h
index e30509c..09579f9 100644
--- a/arm_compute/core/NEON/NEFixedPoint.h
+++ b/arm_compute/core/NEON/NEFixedPoint.h
@@ -46,6 +46,7 @@
 using qint16x8x2_t = int16x8x2_t; /**< 16 bit fixed point vector with 16 elements */
 using qint16x8x3_t = int16x8x3_t; /**< 16 bit fixed point vector with 24 elements */
 using qint16x8x4_t = int16x8x4_t; /**< 16 bit fixed point vector with 32 elements */
+using qint32x2_t   = int32x2_t;   /**< 32 bit fixed point vector with 2 elements */
 using qint32x4_t   = int32x4_t;   /**< 32 bit fixed point vector with 4 elements */
 
 /** Get the lower half of a 16 elements vector