radv: ETC2 emulation fixes.
Found while uprevving Mesa on ChromeOS. Now enabling it in CI (Valve infra, stoney will do ETC2 native) to avoid the late discovery of these.
/cc @jekstrand @mupuf
Found while uprevving Mesa on ChromeOS. Now enabling it in CI (Valve infra, stoney will do ETC2 native) to avoid the late discovery of these.
/cc @jekstrand @mupuf