MRP-1179 libcfs: fix for removing lcw at lcw_dispatch_main

lcw_dispatch_main() creates zombies list and moves lcw into it.
But removes entry from another list in the zombies loop.

Signed-off-by: Alexander Boyko <alexander_boyko@xyratex.com>
Change-Id: Ia234cb81d56169e7241ffda7315a5d977216749e
Reviewed-on: http://morpheus.xyus.xyratex.com:8443/gerrit/583
Tested-by: Jenkins
Reviewed-by: Alexey Lyashkov <Alexey_Lyashkov@xyratex.com>
Reviewed-by: Cheng Shao <cheng_shao@xyratex.com>
Tested-by: Elena Gryaznova <Elena_Gryaznova@xyratex.com>
Reviewed-by: Vitaly Fertman <Vitaly_Fertman@xyratex.com>