net/i40e: fix hotplug remove

testpmd will occur infinite loops when device hotplug remove.
We can fix the issue by using the pci generic remove function

Fixes: ac89d46096d5 ("net/i40e: release port upon close")
Signed-off-by: Chenxu Di <chenxux.di@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>