net/virtio: remove unnecessary Rx error assignments
net/virtio: remove unnecessary Rx error assignments

Remove the unnecessary assignments in Rx functions
as they are useless and misleading.

Signed-off-by: Tiwei Bie <f338cf29d7d69ff1bc99f755ebfb0eb0accd409e@intel.com>

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