[PATCH v2 2/2] examples/ipsec-secgw: add support of NEON with poll mode

[Akhil Goyal]

> This adds the support of NEON based lpm lookup along with
> multi packet processing for burst send in packets routing.
> 
> Performance impact:
> On cn10k, with poll mode inline protocol, outbound performance
> increased by upto ~8% and inbound performance increased by
> upto ~6%.
> 
> Signed-off-by: Rahul Bhansali <rbhansali at marvell.com>
> ---
Acked-by: Akhil Goyal <gakhil at marvell.com>