powerpc/ddb: Dump more state in `show pcpu`HEADmain

Add a new CPU-family `show pcpu` handler, cpu_db_show_mdpcpu() to dump
CPU-specific PCPU data.  Only Book-E is populated for now, but AIM may
be populated later.

These new field prints: save areas, TLB miss nesting, the new critical
stack pointer.  All of them have been very useful for debugging very
esoteric bugs, so make them easier to see from DDB, instead of having to
rummage through hex dumps.

0 files changed, 0 insertions, 0 deletions