Remove use of ArmNN.hpp where it is unnecessary.

Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>
Change-Id: I6c90eab1c6bad76d5c7b3bf094998fa4b454bcd1
diff --git a/src/backends/neon/workloads/NeonLstmFloatWorkload.hpp b/src/backends/neon/workloads/NeonLstmFloatWorkload.hpp
index c116cdd..9a9a878 100644
--- a/src/backends/neon/workloads/NeonLstmFloatWorkload.hpp
+++ b/src/backends/neon/workloads/NeonLstmFloatWorkload.hpp
@@ -5,6 +5,8 @@
 
 #pragma once
 
+#include <armnn/Descriptors.hpp>
+#include <armnn/LstmParams.hpp>
 #include <backendsCommon/Workload.hpp>
 #include <backendsCommon/WorkloadData.hpp>