OpenCSD FreeBSD patch

Hi

I'm adding Coresight tracing support to FreeBSD.

The kernel support is currently on review (https://reviews.freebsd.org/D14618, https://reviews.freebsd.org/D12875).

At this step I would like to include OpenCSD to base FreeBSD distribution, but I have small local change preventing me to do so.

Here is a small patch to OpenCSD attached. Can someone take a look? We use LLVM and the 'params' vector is left uninitialized in ETMv4 decoder.

I'm not sure if this is correct fix, but it works fine for us.

I also added a pull request here: https://github.com/Linaro/OpenCSD/pull/12

Thank you.

Ruslan