freedreno/drm: Don't try to export suballoc bo

Suballoc BOs don't have a real handle, so attempting to dmabuf export
won't work.  Likewise for handle or flink-name export.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23324>

src/freedreno/drm/freedreno_bo.c

@@ -490,6 +490,9 @@ bo_flush(struct fd_bo *bo)
 int
 fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 {
+   if (suballoc_bo(bo))
+      return -1;
+
    if (!bo->name) {
       struct drm_gem_flink req = {
          .handle = bo->handle,
@@ -517,6 +520,8 @@ fd_bo_get_name(struct fd_bo *bo, uint32_t *name)
 uint32_t
 fd_bo_handle(struct fd_bo *bo)
 {
+   if (suballoc_bo(bo))
+      return 0;
    bo->bo_reuse = NO_CACHE;
    bo->alloc_flags |= FD_BO_SHARED;
    bo_flush(bo);
@@ -528,6 +533,9 @@ fd_bo_dmabuf(struct fd_bo *bo)
 {
    int ret, prime_fd;
 
+   if (suballoc_bo(bo))
+      return -1;
+
    ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC | DRM_RDWR,
                             &prime_fd);
    if (ret) {