spi: spidev: Add Rohm DH2228FV DAC compatible string

Since we don't have a driver for it yet, use spidev instead.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 9fc5788..e44abc9 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -645,6 +645,7 @@
 }
 
 static const struct of_device_id spidev_dt_ids[] = {
+	{ .compatible = "rohm,dh2228fv" },
 	{},
 };