Once all processor cores are started and active interrupts have been spread
amongst them, spread out any interrupts which have been allocated but not
yet activated as well. This ensures that drivers which allocate interrupt
vectors at boot time but don't assign handlers until they're actually opened
will have their interrupts distributed too.
This was encountered with a 40Gbps NIC, delivering all interrupts to core 0.
Submitted by: Anton Rang <anton.rang AT isilon.com>
Sponsored by: Dell EMC Isilon