drm/nouveau: Remove duplicate poll_enable() in pmops_runtime_suspend()

Since actual hotplug notifications don't get disabled until
nouveau_display_fini() is called, all this will do is cause any hotplugs
that happen between this drm_kms_helper_poll_disable() call and the
actual hotplug disablement to potentially be dropped if ACPI isn't
around to help us.

Signed-off-by: Lyude Paul <[email protected]>
Acked-by: Karol Herbst <[email protected]>
Acked-by: Daniel Vetter <[email protected]>
Cc: [email protected]
Cc: Lukas Wunner <[email protected]>
Signed-off-by: Ben Skeggs <[email protected]>

Author: Lyude

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -835,7 +835,6 @@ nouveau_pmops_runtime_suspend(struct device *dev)
 		return -EBUSY;
 	}
 
-	drm_kms_helper_poll_disable(drm_dev);
 	nouveau_switcheroo_optimus_dsm();
 	ret = nouveau_do_suspend(drm_dev, true);
 	pci_save_state(pdev);