[Bug 291737] DPAA2 not working with hw.ncpu set

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291737

--- Comment #4 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
I can confirm the problem doing a netboot:
hw.cpu=7 hangs after LINK UP
hw.ncpu=15 boots for me (same for 11)
hw.ncpu=8 seems to hang like 7.

I added printfs to the two places in dpaa2 which limit/bind by CPU, and it
seems the distribution of CPUs is set correctly from 0 <= cpu < n.

According to ddb I see both the MAC and the NI interrupt for the "link up" and
I do see some irqs going on the channel.  sysctl stats confirm packets in and
out;  I wonder if the problem is elsewhere...

I'll have to go and find some time to dig probably on alive system and not on a
netboot if no one beats me to it.

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