cffdump: take enum names from rnndb
add freedreno architecture diagrams
cffdump: decode CP_DRAW_IDX_2

Basically the same as CP_DRAW_IDX except can take index buffer inline.
Probably something worth using in gallium if the index buffer is not
otherwise uploaded.
cffdump: cmdline options to dump only certain frames

Useful for long dumps.
cffdump: basic a4xx support