cryptodev: fix build with icc
cryptodev: fix build with icc

Removed unnecessary macro RTE_STD_C11, which is used
for unnamed structs.
Since there is no longer an unnamed structure in
rte_cryptodev_sym_session, this is not needed and
it is actually breaking compilation on icc:

lib/librte_cryptodev/rte_cryptodev.h(887): error: expected a declaration
  	__extension__ void *sess_private_data[0];
  	^
Fixes: 7c110ce7aa4e ("cryptodev: remove mempool from session")

Signed-off-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>
Acked-by: Declan Doherty <b4388acd850cd8caad5000a112795063f04807ac@intel.com>

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