This brings us in to line with Linux definitions, and also simplifies
adding x86_64 support since both platforms have 2-byte shorts, 4-byte
ints and 8-byte long longs.
Drivers are not allowed to call printf(). Converted eprintf() to DBG(),
and removed spurious startup banner.
Fixed hardcoded inclusion of little_bswap.h
Use EIO rather than 1 as an error number.