[0/9] simplification and decc0ration of CRIS port

[0/9] simplification and decc0ration of CRIS port

[Hans-Peter Nilsson]

This patchset is applied to vendors/axis/cris-decc0.

The intent is to apply it myself to master, once master opens
for stage 1, before the planned destruction of cc0 targets that
was announced last September.  I've earlier obsoleted the
crisv32-* and cris-*-linux* sub-ports as no longer relevant (not
counting retrocomputing), and all but the last parts of the
patchset consist of that removal.

If a global maintainer feels trigger-happy about getting rid of
cc0 before I can apply the patchset myself, then please consider
merging it; it should rebase cleanly at any point.  ChangeLog
entries are in the commit-log.

I intend to rebase the branch now and then, and also improve the
decc0rated CRIS port, which is currently over-simplified to
avoiding early fallout from the decc0ration, but also suffering
from long-time bit-rot from generic changes like changes in rtx
cost, register allocator, various rtl canonicalization changes,
mult->shift in address-like expressions, to name a few causes.

brgds, H-P