net: Zeroing the structure ethtool_wolinfo in ethtool_get_wol()

net: Zeroing the structure ethtool_wolinfo in ethtool_get_wol()

CVE-2014-9900

memset() the structure ethtool_wolinfo that has padded bytes
but the padded bytes have not been zeroed out.

Change-Id: If3fd2d872a1b1ab9521d937b86a29fc468a8bbfe
Signed-off-by: Avijit Kanti Das <avijitnsec@codeaurora.org>
(cherry-picked from commit 63c317dbee97983004dffdd9f742a20d17150071
 https://source.codeaurora.org/quic/la/kernel/msm-3.10)
Signed-off-by: Brad Figg <brad.figg@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Colin King <colin.king@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>