Plugins should now implement and register a device_factory_t to
configure how that device should be parsed from a FDT, and an optional
default DTS string.

This drops support for command-line flag-based device configuration

This class should implement conditional fdt-based device instantiation,
as well as adding device nodes to the dts

make_dtb is only called here, this simplifies later work
towards refactoring device DTS node generation

These are redundant with sim_t::devices

Have CI run on each commit in a PR, instead of just the HEAD

test

Fix: PMP checking region on CBO instructions

The spec says "The PMP access control bits shall be the same for all
physical addresses in the cache block [... else] the behavior of a CBO
instruction is UNSPECIFIED."

Thus, we only need to check the byte rs1 points to
(instead of the entire cache block).

Replace ternary operator with std:min

Add support for BF16 extensions

Fix bugs in disassembling code for cm.mva01s/mvsa01 instructions

dscr.ebreakh is now dcsr.ebreakv[su]

This change was made ages ago in the spec.

I did not actually test that the new privilege checks in ebreak and
c.ebreak are correct, but all the existing debug tests still pass.