drm/sun4i: 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 sun4i.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-21-tzimmermann@suse.de

drivers/gpu/drm/sun4i/sun4i_drv.c

@@ -97,8 +97,6 @@ static int sun4i_drv_bind(struct device *dev)
 	if (ret)
 		goto cleanup_mode_config;
 
-	drm->irq_enabled = true;
-
 	/* Remove early framebuffers (ie. simplefb) */
 	ret = drm_aperture_remove_framebuffers(false, "sun4i-drm-fb");
 	if (ret)