staging: lustre: remove linux-prim.h

It's empty now, move the #include lines it was pulling in, into libcfs.h
and sort them to remove the duplicates.

Odds are they all aren't needed, but let's not break the build by
experimenting with removing them at this point in time.

Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>