net: netsec: Sync dma for device on buffer allocation

cd1973a9

 ("net: netsec: Sync dma for device on buffer allocation")
was merged on it's v1 instead of the v3.
Merge the proper patch version

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>