I was just looking over the cpu_subr.c file from arch/powerpc/oea, and the
MPC7447A isn't particularly supported. Additionally, going into power save
mode isn't enabled for this family, and overall the power save mode is
missing a couple instructions to preserve Altivec operation before entering
power save. I'm looking into possible solutions (while I try to figure out
why if_mc.c only uses two of the three interrupts and if this is important).

tim