linux-generic: netmap: wait for the interface to become active
linux-generic: netmap: wait for the interface to become active

Netmap interface takes a few seconds to become active after
calling nm_open(). This caused several test applications to
fail. Check link status at the end of netmap_open() to fix
this.

Signed-off-by: Matias Elo <62402263e8617147f0e4dd5b7f6f8ec67f2b3d2c@nokia.com>
Reviewed-and-Tested-by: Stuart Haslam <1fce01f364ef5298e64e07a42e08efeef153fa98@linaro.org>
Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

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