IB/sa: Fix rdma netlink message flags

The flags to ibnl_put_msg should be NLM_F_REQUEST instead of GFP_KERNEL.

Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: John Fleck <john.fleck@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>