freedreno: Add a7xx crashdump-related registers and enums
What does this MR do and why?
freedreno: Add a7xx crashdump-related registers and enums
These come from kgsl, and we will need them to capture GPU state for
devcoredump.
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.