configure.ac: default to addressing direct,0x1000

This avoids the annoying vm.mmap_min_addr nonsense.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
ppc-cpu: reduce MIPS logging frequency even further

This makes it print about once every 2 seconds @ 70 MIPS.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>