- Add a powerpc-specific RF_LITTLEENDIAN resource flag to request a
little-endian bus tag for the SATA BAR instead of setting the bustag
explicitly down in the SATA driver.
- Consistently map SYS_RES_IOPORT to SYS_RES_MEMORY for
bus_activate/deactivate/adjust/release_resource.
- Implement bus_map/unmap_resource.
- Add an implementation of bus_adjust_resource.