drm/nouveau: Implement switcheroo reprobe with drm_client_dev_hotplug()

Replace the call to drm_fb_helper_output_poll_changed() with a call
to drm_client_dev_hotplug(). It is equivalent in functionality, but
uses the DRM client infrastructure.

v2:
- fix commit description
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240812083000.337744-6-tzimmermann@suse.de

drivers/gpu/drm/nouveau/nouveau_vga.c

@@ -58,8 +58,9 @@ static void
 nouveau_switcheroo_reprobe(struct pci_dev *pdev)
 {
 	struct nouveau_drm *drm = pci_get_drvdata(pdev);
+	struct drm_device *dev = drm->dev;
 
-	drm_fb_helper_output_poll_changed(drm->dev);
+	drm_client_dev_hotplug(dev);
 }
 
 static bool