UPSTREAM: staging/gdm72xx: cleanup little at gdm_wimax_event_rcv

UPSTREAM: staging/gdm72xx: cleanup little at gdm_wimax_event_rcv

the event sock check is done at the netlink_init itself.

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 8df858ea76b76dde9a39d4edd9aaded983582cfe)

Change-Id: I8ef8a42bdd6ac462211344371174a20d28b049a9
Reviewed-on: https://gerrit.chromium.org/gerrit/30132
Reviewed-by: Olof Johansson <olofj@chromium.org>
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>