malloc(9) -> kmem(9)

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

Do the bus.h -> bus_{defs,funcs}.h split and change all occurrences of
<machine/bus.h> to <sys/bus.h>.

Use __builtin_clz instead of cntlzw

Remove clause 3 and 4 from TNF licenses

Import the rs6000 port into the tree.

This port of NetBSD is intended to run on MCA-based IBM RS/6000
machines. The port so far has only been tested on a 7006-41T, which is a
601-based RS/6000. Th

Import the rs6000 port into the tree.

This port of NetBSD is intended to run on MCA-based IBM RS/6000
machines. The port so far has only been tested on a 7006-41T, which is a
601-based RS/6000. The port also contains a limited set of code for the
7012-3XX machines, but support for those is a long way off still.

The port builds and generates a working kernel, however, it still lacks
bus_dma code for the MCA bus, so at present, only the com ports work,
though any other device (such as the printer/keyboard) located on the
ioplanar could probably be made to work. Work will continue on this port
as I iron out the DMA code.

This port was made possible by a generous gonation of hardware by Kevin
Bowling, who also provided much of the documentation for the port.

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