Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

more support SL-C1000.

- device_t/softc split.
- use aprint_* function.

device_t/softc split.

don't print cable detect messages.

Add zusb device for powering on the USB port. Also configure USB port 2
via the client USB on the pxa270, as it appears USB port 2 is the
externally routed port.

The linux driver was used as docume

Add zusb device for powering on the USB port. Also configure USB port 2
via the client USB on the pxa270, as it appears USB port 2 is the
externally routed port.

The linux driver was used as documentation for GPIO pins and port
settings.

Note that this only seems to work for one boot, a reboot loses for some
reason, perhaps something in the USB client area needs to be configured.

XXX: perhaps we should make zusb a device that attached/detaches the USB
USB host or client device depending on the plugged in cable.

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