security: fix pedantic compilation
security: fix pedantic compilation

/x86_64-native-linuxapp-gcc/include/rte_security.h:229:8:
error: struct has no members [-Werror=pedantic]
  struct rte_security_macsec_xform {
         ^~~~~~~~~~~~~~~~~~~~~~~~~
/x86_64-native-linuxapp-gcc/include/rte_security.h:453:3:
error: struct has no members [-Werror=pedantic]
    struct {
    ^~~~~~

Fixes: c261d1431bd8 ("security: introduce security API and framework")
Cc: stable@dpdk.org

Signed-off-by: Nelio Laranjeiro <2f8dd9032d5b85ca4b53dec8ce664eb6998836be@6wind.com>
Acked-by: Akhil Goyal <74d7c4c993a22c1d4f60c46ff3d95c969a24a25c@nxp.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk