There's core dump when launching l3fwd with 1 queue 1 core. It's
because NULL pointer is used if fail to configure device.
This patch removes incorrect check during device configuration,
and checks NULL pointer when executing VIRTCHNL2_OP_DEALLOC_VECTORS.
Fixes: 549343c25db8 ("net/idpf: support device initialization")
Fixes: 70675bcc3a57 ("net/idpf: support RSS")
Fixes: 37291a68fd78 ("net/idpf: support write back based on ITR expire")
Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
8c6ef17e1f