The nfs client module nfscl.ko has definitions for both
"nfscl" and "nfs" module names. This can cause confusion
and it appears the "nfs" module name is not needed.
mount_nfs.c as far back as FreeBSD8 knows to use
"nfscl" as the name for the client module.
I thought that very old versions of mount_nfs used
"nfs" as the module name to load, but that is not
the case for at least FreeBSD8 and newer.
This patch removes the definition of the "nffs" module,
to simplify the code and avoid confusion w.r.t. the
Suggested by kib@.