Commit 
5a441aade5b3 ("iio: light: vcnl4000 add support for the VCNL4040
proximity and light sensor") added the support for the vcnl4040 but
forgot to add the of_compatible. Fix this by adding it now.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Fixes: 5a441aade5b3 ("iio: light: vcnl4000 add support for the VCNL4040 proximity and light sensor")
Reviewed-by: Angus Ainslie (Purism) angus@akkea.ca
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
                .compatible = "vishay,vcnl4020",
                .data = (void *)VCNL4010,
        },
+       {
+               .compatible = "vishay,vcnl4040",
+               .data = (void *)VCNL4040,
+       },
        {
                .compatible = "vishay,vcnl4200",
                .data = (void *)VCNL4200,