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H A Datpic.cdiff 269675 Thu Aug 07 15:04:20 MDT 2014 royger atpic: make sure atpic_init is called after IO APIC initialization

After r269510 the IO APIC and ATPIC initialization is done at the same
order, which means atpic_init can be called before the IO APIC has
been initalized. In that case the ATPIC will take over the interrupt
sources, preventing the IO APIC from registering them.

Reported by: David Wolfskill <david@catwhisker.org>
Tested by: David Wolfskill <david@catwhisker.org>,
Trond Endrestøl <Trond.Endrestol@fagskolen.gjovik.no>
Sponsored by: Citrix Systems R&D

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