powerpc/pic: Add a PIC_AP_INIT() to set up AP PIC info
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Authored by jhibbits on Thu, Apr 16, 3:24 AM.

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adrian

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PowerPC

Summary

pc_cpuid may not match the PIC's idea of a given CPU. Since openpic
has a WHOAMI register, we can use that to get the PIC's idea of the CPU.
This needs to be done on each AP, so add a PIC_AP_INIT device method so
the PIC can perform any AP-specific initialization at AP bootstrap time.

This fixes SMP on e6500, which is still lacking SMT support.