iio: light: bh1780: use mod_devicetable.h and drop of_match_ptr macro

Whilst this enables ACPI binding or the device via PRP0001 the
primary aim is to remove potential for these two things to be
cut and paste into new drivers.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>

drivers/iio/light/bh1780.c

@@ -13,7 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
 #include <linux/pm_runtime.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -273,13 +273,11 @@ static const struct i2c_device_id bh1780_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, bh1780_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id of_bh1780_match[] = {
 	{ .compatible = "rohm,bh1780gli", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, of_bh1780_match);
-#endif
 
 static struct i2c_driver bh1780_driver = {
 	.probe		= bh1780_probe,
@@ -288,7 +286,7 @@ static struct i2c_driver bh1780_driver = {
 	.driver = {
 		.name = "bh1780",
 		.pm = &bh1780_dev_pm_ops,
-		.of_match_table = of_match_ptr(of_bh1780_match),
+		.of_match_table = of_bh1780_match,
 	},
 };