continuing troubles with AMD64

The good part: the Mar 1st -current kernel works fine.

The bad:
	1) Any newer kernels don't see the system drive, presumably,
	abecause ttempts to allocate IRQs for the all of the
	aata-controllers fail.

	2) Yesterday's kernel panics with:

		madt_probe_cpus_handler: CPU ID 129 too high

	Indeed, 129 is greater than NLAPICS, which is 32, but the
	Mar 1st kernel works.

We can work around the second problem by disabling the APIC in the BIOS,
or by disabling the ACPI altogether on the loader's prompt.

We did not yet find the workaround for 1), however. All of the
ata-controllers and some other hardware (like firewire) report "unable
to allocate IRQ" with any of the more recent kernels.

I'm attaching the dmesg.boot, as obtained with the Mar 1st kernel. Please,
advise. Thanks!

	-mi