Revert "Revert "IVGCVSW-6268 Add support of Unidirectional Sequence Lstm fp32/fp16 to Neon""

This reverts commit f87b90e4dbb906436cf205a2a19e199bfe9224ed.

Reason for revert: 22.02 release.

Change-Id: I1ca5a79a8957908f655a6c4e79eefa24c5aec645
diff --git a/src/backends/neon/backend.mk b/src/backends/neon/backend.mk
index 8ae50ac..d43426f 100644
--- a/src/backends/neon/backend.mk
+++ b/src/backends/neon/backend.mk
@@ -84,7 +84,8 @@
         workloads/NeonStridedSliceWorkload.cpp \
         workloads/NeonSubtractionWorkload.cpp \
         workloads/NeonTransposeConvolution2dWorkload.cpp \
-        workloads/NeonTransposeWorkload.cpp
+        workloads/NeonTransposeWorkload.cpp \
+        workloads/NeonUnidirectionalSequenceLstmFloatWorkload.cpp
 
 else