panfrost: Implement EXT_multisampled_render_to_texture
Significantly helps WebGL performance with Chromium's OpenGL ES backend. Also update docs/features.txt Signed-off-by:Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <!6161>
Significantly helps WebGL performance with Chromium's OpenGL ES backend. Also update docs/features.txt Signed-off-by:Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <!6161>