drm/imx/parallel-display: drop unused module alias

drm/imx/parallel-display: drop unused module alias

The driver has never supported anything but OF probe so drop the unused
platform module alias incorrectly added by commit b2da05ff4797
("imx-drm: parallel-display: Add MODULE_ALIAS()")

Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250924092643.26113-5-johan@kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>