winsys/amdgpu: remove exported buffers from the cache

Cc: 11.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

src/gallium/winsys/amdgpu/drm/amdgpu_bo.c

@@ -684,6 +684,9 @@ static boolean amdgpu_bo_get_handle(struct pb_buffer *buffer,
    enum amdgpu_bo_handle_type type;
    int r;
 
+   if ((void*)bo != (void*)buffer)
+      pb_cache_manager_remove_buffer(buffer);
+
    switch (whandle->type) {
    case DRM_API_HANDLE_TYPE_SHARED:
       type = amdgpu_bo_handle_type_gem_flink_name;