The last user is gone since commit

	2962db71 ("staging/fbtft: Remove fbtft_device")

in 2019.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211007121415.2401638-3-u.kleine-koenig@pengutronix.deSigned-off-by: NMark Brown <broonie@kernel.org>