net/bonding: fix slaves initializing on MTU setting

net/bonding: fix slaves initializing on MTU setting

If a initial process for the bonding device is like:
rte_eth_dev_configure
rte_eth_dev_set_mtu
queue setup and start, etc.

Pass the vdev args to application, and init bonding device only.
-a 0000:af:00.0 --vdev="net_bonding0,mode=2,slave=0000:af:00.0"

It will fail and complain for the slave device
"Port 0 must be configured before MTU set"

Test can be reproduced with ovs.

Fixes: b26bee10ee37 ("ethdev: forbid MTU set before device configure")
Cc: stable@dpdk.org
Signed-off-by: Junjie Wan <wanjunjie@bytedance.com>
Tested-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Min Hu (Connor) <humin29@huawei.com>