staging/lustre/lnet: Reenable lnet router debugfs

It looks like router proc files were defined out, so I missed them
during debugfs conversion.
Reenable the code and move all the variables to debugfs.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>