panfrost: Add support for rbg16 formats

Fixes: 171e94fe629 ("mesa/st: enable EXT_color_buffer_half_float when formats supported")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6887>
2 files changed