RTE_NET_AF_XDP_LIBXDP is a conditional to include xdp/xsk.h and should
be set as soon as we know that the header is present.
RTE_NET_AF_XDP_SHARED_UMEM is one of conditions to use
xsk_socket__create_shared().
Both do not depend on libbpf and bpf/bpf.h presence.
Since else branch below returns error, there is no functional changes,
just style which will help on further rework.
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Ferruh Yigit <ferruh.yigit@xilinx.com>
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