freedreno/afuc: Use emulator to extract jmptbl

freedreno/afuc: Use emulator to extract jmptbl

This runs through the SQE bootstrap code to extract the packet-table,
rather than relying on heuristics.  As a bonus, it can detect the start
of the LPAC fw in a660+ fw so that we can properly decode the LPAC fw
and packet-table.

Note that this decodes the jmptable as normal instructions, which is a
change in behavior from the previous heuristic based jmptbl extraction.
Not sure if that is a good or bad thing.

For a5xx, for now the legacy heuristic based jmptable decoding is
preserved, at least until enough control regs are figured out.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10944>