datapath: Account for "vxlan: Eliminate dependency on UDP socket in transmit path"

datapath: Account for "vxlan: Eliminate dependency on UDP socket in transmit path"

Excludes VXLAN_F_REMCSUM_TX bits as OVS currently doesn't support it.

Upstream commit:
    vxlan: Eliminate dependency on UDP socket in transmit path

    In the vxlan transmit path there is no need to reference the socket
    for a tunnel which is needed for the receive side. We do, however,
    need the vxlan_dev flags. This patch eliminate references
    to the socket in the transmit path, and changes VXLAN_F_UNSHAREABLE
    to be VXLAN_F_RCV_FLAGS. This mask is used to store the flags
    applicable to receive (GBP, CSUM6_RX, and REMCSUM_RX) in the
    vxlan_sock flags.

    Signed-off-by: Tom Herbert <therbert@google.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
Upstream: af33c1adae1e ("vxlan: Eliminate dependency on UDP socket in transmit path")
Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>