radv: add support for user event markers with SQTT

This enables VK_EXT_debug_marker only if SQTT is enabled, otherwise
it's just useless.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9099>
2 files changed