drm/armada: Don't set struct drm_device.irq_enabled

The field drm_device.irq_enabled is only used by legacy drivers
with userspace modesetting. Don't set it in armada.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-6-tzimmermann@suse.de

drivers/gpu/drm/armada/armada_drv.c

@@ -130,8 +130,6 @@ static int armada_drm_bind(struct device *dev)
 	if (ret)
 		goto err_comp;
 
-	priv->drm.irq_enabled = true;
-
 	drm_mode_config_reset(&priv->drm);
 
 	ret = armada_fbdev_init(&priv->drm);