Even when PCI_IOV is not enabled, ixl still attempts to call iflib_softirq_alloc_generic(...IFLIB_INTR_IOV), which results in warnings similar to the following.
taskqgroup_attach_cpu: qid not found for iov cpu=2 ixl2: taskqgroup_attach_cpu failed 22
#ifdef out this call to iflib_softirq_alloc_generic() so as to silence these warnings.