SMP kernel now boots UP system

[Sepherosa Ziehau <sepherosa@xxxxxxxxx>]

Hi all,

The latest master (0bccf4f58edd59054bb036701eb5eabf8faf3a6e) contains
all necessary code to boot UP system using SMP kernel, please test.

On some of the relatively old systems (probably before 2003), on which
MADT or MPTABLE does not exist, using SMP kernel will not give you
have visible benefit.
On most of the recent systems (after 2004?), SMP kernel on UP system
will give you:
- LAPIC timer
- I/O APIC

(P.S. UP kernel with LAPIC timer and I/O APIC support is on its way :)

Best Regards,
sephe

-- 
Tomorrow Will Never Die