In some cases of using vfio-pci driver, it should be required
to enable pa or va mode. Without it, rtl_eal_init unable to
allocate memory required. Debugging told that iova-mode pa/va
could help. And it helps.
This patch allows to pass iova-mode to vpp startup.conf
Type: feature
Change-Id: I36b87f5d3d141891b37cda2c306d50433954a34a
Signed-off-by: Vladimir Ratnikov <vratnikov@netgate.com>