linux: compile sunxi-emac into kernel for cubieboard

The network driver needs to be compiled into the kernel for booting from
network over NFS.
linux: compile sunxi-emac into kernel for cubieboard2

The network driver needs to be compiled into the kernel for booting from
network over NFS.
linux: compile sunxi-emac into kernel for cubietruck

The network driver needs to be compiled into the kernel for booting from
network over NFS.
Merge pull request #30 from net147/sunxi-emac-compiled-in

Compile sunxi-emac into kernel for booting from network over NFS