Make sure to clear bss before jumping to a kernel copied from load buffer.

This will fix yet another boot failure issue
"screen white-out after loading a kernel"
https://mail-index.netbsd.org/port-

Make sure to clear bss before jumping to a kernel copied from load buffer.

This will fix yet another boot failure issue
"screen white-out after loading a kernel"
https://mail-index.netbsd.org/port-zaurus/2019/10/26/msg000072.html

Should be pulled up to netbsd-8 and netbsd-9.

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- WARNS=4
- object size is more smaller.

Advertise printk() as a printf-like function. (from OpenBSD)

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the v

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

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Added RCS Id.

remove unused function.

Update from the latest Zaurus source from NONAKA Kimihiro.

- LCD screen and keyboard are working now.
- Add bootstrap loader.