In anticipation of updating the mcontrol6 version, where these details
matter.

Just to keep things cleaner.

The new semantics are that the hardware gets to decide what the timing
is, and the debugger has no input on it. This implements that, but still
using the old bit encodings. That's still valid since all trigger
registers are WARL.

Functionally this means tinfo is updated to bump the version, and
mcontrol6 loses the timing bit and now has hit0 and hit1 bits to
describe in detail when a trigger was hit.

This requires a new debug_defines, generated by the debug spec.