BUS_PROBE_GENERIC and not BUS_PROBE_SPECIFIC (0) so the OFW SPI bus can
attach when enabled. Export the spibus devclass_t and driver_t
declarations.
Submitted by: ray
Approved by: adrian (mentor)
If I interpret the C standard correctly, the storage specifier should be
placed before the inline keyword. While at it, replace __inline by
inline in the files affected.