net/iavf: fix queue pairs configuration
net/iavf: fix queue pairs configuration

Check if there are enough queue pairs currently allocated, and if not,
request PF to allocate them.

Fixes: e436cd43835b ("net/iavf: negotiate large VF and request more queues")
Cc: stable@dpdk.org

Signed-off-by: Alvin Zhang <c5463347bfd64f7a052e86eaaf49a5760efc9625@intel.com>
Tested-by: Zhimin Huang <4f827692516eed292bdb4f6c47326cb0eb8e5f6c@intel.com>
Acked-by: Qi Zhang <9e9e58ffa71a29bb7b87766b362515be648fcbe0@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk