drm/nv40/disp: implement support for hotplug irq

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index c4edba6..57ccda4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -273,8 +273,11 @@
 		engine->display.destroy		= nv04_display_destroy;
 		engine->display.init		= nv04_display_init;
 		engine->display.fini		= nv04_display_fini;
+		engine->gpio.init		= nv10_gpio_init;
+		engine->gpio.fini		= nv10_gpio_fini;
 		engine->gpio.drive		= nv10_gpio_drive;
 		engine->gpio.sense		= nv10_gpio_sense;
+		engine->gpio.irq_enable		= nv10_gpio_irq_enable;
 		engine->pm.clocks_get		= nv40_pm_clocks_get;
 		engine->pm.clocks_pre		= nv40_pm_clocks_pre;
 		engine->pm.clocks_set		= nv40_pm_clocks_set;