Regression after "Remove support for reporting coalesced APIC IRQs"

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Hi Jan,

I bisected [1] to f1ed0450a5fac7067590317cbf027f566b6ccbca. Fortunately
further investigation showed that it is not really related to removing
APIC timer interrupt reinjection and the real problem is that we cannot
assume that __apic_accept_irq() always injects interrupts like the patch
does because the function skips interrupt injection if APIC is disabled.
This misreporting screws RTC interrupt tracking, so further RTC interrupt
are stopped to be injected. The simplest solution that I see is to revert
most of the commit and only leave APIC timer interrupt reinjection.

If you have more elegant solution let me know.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=58931
--
			Gleb.
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