DEPENDENCIES: add netmap pktio install instructions
DEPENDENCIES: add netmap pktio install instructions

Added netmap pktio installation instructions.

Signed-off-by: Matias Elo <62402263e8617147f0e4dd5b7f6f8ec67f2b3d2c@nokia.com>
Reviewed-and-tested by: Petri Savolainen <petri.savolainen@nokia.com>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

rsalveti/odp,nmorey/odp,nmorey/odp,ravineet-singh/odp,kalray/odp-mppa,kalray/odp-mppa,kalray/odp-mppa,dkrot/odp,kalray/odp-mppa,rsalveti/odp,erachmi/odp,dkrot/odp,kalray/odp-mppa,dkrot/odp,kalray/odp-mppa,mike-holmes-linaro/odp,erachmi/odp,rsalveti/odp,erachmi/odp,dkrot/odp,rsalveti/odp,mike-holmes-linaro/odp,mike-holmes-linaro/odp,rsalveti/odp,nmorey/odp,erachmi/odp,mike-holmes-linaro/odp,nmorey/odp,ravineet-singh/odp,ravineet-singh/odp,ravineet-singh/odp,kalray/odp-mppa