drm/radeon: stop using dma_resv_excl_fence

Instead use the new dma_resv_get_singleton function.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220321135856.1331-8-christian.koenig@amd.com

drivers/gpu/drm/radeon/radeon_display.c

@@ -533,7 +533,12 @@ static int radeon_crtc_page_flip_target(struct drm_crtc *crtc,
 		DRM_ERROR("failed to pin new rbo buffer before flip\n");
 		goto cleanup;
 	}
-	work->fence = dma_fence_get(dma_resv_excl_fence(new_rbo->tbo.base.resv));
+	r = dma_resv_get_singleton(new_rbo->tbo.base.resv, false, &work->fence);
+	if (r) {
+		radeon_bo_unreserve(new_rbo);
+		DRM_ERROR("failed to get new rbo buffer fences\n");
+		goto cleanup;
+	}
 	radeon_bo_get_tiling_flags(new_rbo, &tiling_flags, NULL);
 	radeon_bo_unreserve(new_rbo);