asahi: Clamp index buffer extent to what's read
What does this MR do and why?
asahi: Clamp index buffer extent to what's read
This makes for cleaner agxdecodes, I think this matches what I've seen on the macOS side but I might be misremembering. Certainly shouldn't hurt.
This only applies for direct draws.
Signed-off-by: Alyssa Rosenzweig alyssa@rosenzweig.io