iio: adc: ti_am335x_adc: Add the am437x compatible

This driver supports both the legacy controller (am33xx) and the
extended one (am437x), so let's add a new compatible.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211015081506.933180-46-miquel.raynal@bootlin.com

drivers/iio/adc/ti_am335x_adc.c

@@ -738,6 +738,7 @@ static SIMPLE_DEV_PM_OPS(tiadc_pm_ops, tiadc_suspend, tiadc_resume);
 
 static const struct of_device_id ti_adc_dt_ids[] = {
 	{ .compatible = "ti,am3359-adc", },
+	{ .compatible = "ti,am4372-adc", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ti_adc_dt_ids);