[LEDE-DEV] Layerscape package depending on libxml2

[Y.b. Lu]

Hi John and Hauke,

May I have your suggestion about an old problem? The pull request was merged leaving out fmc package.
https://github.com/openwrt/openwrt/pull/724

I'd like to add this package fmc (frame manager configuration) for layerscape. 
However it depends on libxml2 package which is not in the base feed. Must install feeds to enable and build it.
So I think I need some suggestion to find out a proper way to add this package.

Thanks a lot.

Best regards,
Yangbo Lu