staging/lustre/ptlrpc: Fix Multiple Assignments

Fix all multiple assignments on lustre/ptlrpc directory.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>