Staging: lustre: fix assignment in if condition in fsfilt.c

This is a patch to the fsfilt.c file that fixes up three assignment in if
condition errors found by the checkpatch.pl tool.

Signed-off-by: Jon Bernard <jbernard@tuxion.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>