panfrost: format version cleanup
We're currently playing a bit fast and lose with the formats supported by different hardware generations. This mostly means we're not taking into account new hardware capabilities.
Let's clean this up, to make it easier to maintain this. We're going to be adding v10 soon, and even though that doesn't have new format definitions, it gets easier to maintain the code with less open-coded generation handling.
Edited by Erik Faye-Lund