fix arm neon types problem

[salcanmor]

No description provided.

[bennihoffmann]

This occurse only if you compile the hole project with sdsoc/++ compiler. It doesnt like neon intrinsics. To avoid that problem, you have to move it to a seperate file and you need to compile that code containing neon intrinsics with the regular arm gcc/g++ compiler separately and link it in manually. This will prevent the source code from being parsed by the sdscc/++ when looking for places to instrument.