panfrost: Add tool to print supported texture formats

While all Panfrost-supported Mali GPUs support all the compressed texture formats architecturally, the system integrator decides which formats will actually be wired up in the production system-on-chip. In the past there may have been legal considerations, I'm neither a lawyer nor a system integrator so couldn't say.

It's useful for users to know which compressed texture formats are supported by their hardware, to understand its performance characteristics (and perhaps to buy systems that support their needs, especially if they need BCn formats which are omitted in many Mali implementations).

To help with that, this commit adds a small standalone tool that prints which formats are supported. It is tested so far on Mali-T860 and Mali-G57.

Signed-off-by: Alyssa Rosenzweig alyssa@collabora.com