The files come from commit "wr-switch-sw-v3.0" of wr-switch-sw
project.  They are straight copies from kernel/wr_nic (there) to
kernel/wr_nic (here).  Three have not been copied, as they don't apply
here: dmtd.c, pps.c, module.c

Later patches will customize them to they compile in this environment.
Note that as of this commit they are not compiled by the Mafile yet,
this is only a verbatim copy to easily keep track of differences.