panfrost: AFBC compress Z16 depth buffers

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7201>

src/panfrost/lib/pan_afbc.c

@@ -103,6 +103,7 @@ panfrost_format_supports_afbc(enum pipe_format format)
         case PIPE_FORMAT_B8G8R8_UNORM:
         case PIPE_FORMAT_R5G6B5_UNORM:
         case PIPE_FORMAT_B5G6R5_UNORM:
+        case PIPE_FORMAT_Z16_UNORM:
                 return true;
         default:
                 return false;