drm/rockchip: Don't set struct drm_driver.output_poll_changed

Don't set struct drm_driver.output_poll_changed. It's used to restore
the fbdev console. But as rockchip uses generic fbdev emulation, the
console is being restored by the DRM client helpers already. See the
functions drm_kms_helper_hotplug_event() and
drm_kms_helper_connector_hotplug_event() in drm_probe_helper.c.

v2:
	* fix commit description (Christian)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221103151446.2638-9-tzimmermann@suse.de

drivers/gpu/drm/rockchip/rockchip_drm_fb.c

@@ -9,7 +9,6 @@
 #include <drm/drm.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_damage_helper.h>
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_framebuffer_helper.h>
@@ -72,7 +71,6 @@ rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
 
 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
 	.fb_create = rockchip_fb_create,
-	.output_poll_changed = drm_fb_helper_output_poll_changed,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };