staging/lustre/libcfs: Remove "Please contact Oracle" from header

The "Please contact Oracle Corporation" lines are removed since not
only Oracle has nothing to do with Lustre anymore, there's a pointer
to GPL already that's independent of any particular company.

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