radv: disable GFX12+ support

It's mostly broken, but 25.0+ should be good enough.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33113>

src/amd/vulkan/winsys/amdgpu/radv_amdgpu_winsys.c

@@ -21,12 +21,25 @@
 #include "vk_drm_syncobj.h"
 #include "xf86drm.h"
 
+static bool
+radv_is_gpu_supported(const struct radeon_info *info)
+{
+   /* GFX12 isn't supported. */
+   if (info->gfx_level >= GFX12)
+      return false;
+
+   return true;
+}
+
 static bool
 do_winsys_init(struct radv_amdgpu_winsys *ws, int fd)
 {
    if (!ac_query_gpu_info(fd, ws->dev, &ws->info, true))
       return false;
 
+   if (!radv_is_gpu_supported(&ws->info))
+      return false;
+
    /*
     * Override the max submits on video queues.
     * If you submit multiple session contexts in the same IB sequence the