Concerning the in/out macros in pio.h, I noticed something in the linux kernel
source which we're not doing in NetBSD.  Namely, linux is not using the generic
in/out macros for talking to the R4030, but rather having separate functions
for read/writing to the R4030 which suffix every read/write with four nop
instructions.  I was wondering since we're not doing this if it could cause
problems.  Or at least be the cause of my problem?

-Mark