[chirp_devel] Patch for Wouxun Power Level Support

Hi all,

I don't know what the preferred method of submitting patches is but I just created an hg diff in this instance. Let me know if a different way is preferred.

This patch adds power level support to the Wouxun radios. I tested it on my KG-UV3D.

I will be adding more features over time but this one was higher on my list.

Thanks,

~Lou