examples/ipsec-secgw: increase number of dev mappings
examples/ipsec-secgw: increase number of dev mappings

Increasing the number of cdev mappings to accommodate usage of crypto
devices with larger number of capabilities, with higher number of cores.

Required mappings : ([no of ciphers] * [no of auth] + [aead algos]) *
                    [no of cores]

Signed-off-by: Ankur Dwivedi <62c4ae1ac4559af880715194de3f0ef811712fbb@caviumnetworks.com>
Signed-off-by: Anoob Joseph <854cf518c6746dae2d952dd5f30e699f0b28a022@caviumnetworks.com>
Acked-by: Akhil Goyal <74d7c4c993a22c1d4f60c46ff3d95c969a24a25c@nxp.com>

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