Add ppoll(2) for compat linux32.
Regen for ppoll(2)
Fix ppoll signature (int ->u_int)
Regen for ppoll signature fix
Add Atheros AR3012
Regen for Atheros AR3012
Kill sme_callout_mtx and use sme_mtx instead

We can use sme_mtx for the callout as well. Actually we should do so
because sme_events_list and some other data that are touched in the
callout should be protected by sme_mtx, not sme_callout_mtx.

Discussed with riastradh@ in http://mail-index.netbsd.org/tech-kern/2014/11/11/msg017956.html
deal with Ingenic XBurst CPUs