drm/udl: Switch poll helpers to managed cleanup
Call drmm_kms_helper_poll_init() to set up managed cleanup for
connector polling.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250303145604.62962-3-tzimmermann@suse.de