panfrost: Add PAN_MESA_DEBUG=gles3 option

This enables experimental GLES3.0 support without ES3.1/2 hacks.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3950>
2 files changed