nfp: flower: remove vlan CFI bit from push vlan action

[ Upstream commit 42cd5484a22f1a1b947e21e2af65fa7dab09d017 ]

We no longer set CFI when pushing vlan tags, therefore we remove
the CFI bit from push vlan.

Fixes: 1a1e586f ("nfp: add basic action capabilities to flower offloads")
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>