p64h2_enable_ioapic

[Andrew Ip]

Hi,

In src/southbridge/intel/82870/p64h2_ioapic.c,
p64h2_enable_ioapic is hard coded to initialize io apic address numbers 
3,4,5,&8.  However, I have a custom board which has 3,4,5,8,9 and 10.
In order to get it to work, I have to change
for(i=0,dev=0;i<4;i++) {
to
for(i=0,dev=0;i<6;i++) {

To fix it properly, I think we have to detect the number of APIC instead
of hard code it.  Comment?

-Andrew