drm/nouveau: use correct conflicting framebuffer API

nouveau was calling the fbdev API which has issues with modules
and built-ins. Call the correct API.

Reported-by: Randy Dunlap <[email protected]>
Acked-by: Randy Dunlap <[email protected]> # build-tested
Fixes: 2dd4d16 ("drm/nouveau: remove open-coded version of remove_conflicting_pci_framebuffers()")
Link: https://lore.kernel.org/lkml/[email protected]/T/#u
Signed-off-by: Dave Airlie <[email protected]>

Author: airlied

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -697,7 +697,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
 	nvkm_device_del(&device);
 
 	/* Remove conflicting drivers (vesafb, efifb etc). */
-	ret = remove_conflicting_pci_framebuffers(pdev, "nouveaufb");
+	ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "nouveaufb");
 	if (ret)
 		return ret;