regulator: fan53555: Add support for FAN53555BUC18X type

FAN53555BUC18X has the DIE_ID 8, starts at 600mV and
increments in 10mV steps.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index 2cb5cc3..d4bfa93 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -65,6 +65,7 @@
 	FAN53555_CHIP_ID_03,
 	FAN53555_CHIP_ID_04,
 	FAN53555_CHIP_ID_05,
+	FAN53555_CHIP_ID_08 = 8,
 };
 
 enum {
@@ -220,6 +221,7 @@
 	case FAN53555_CHIP_ID_01:
 	case FAN53555_CHIP_ID_03:
 	case FAN53555_CHIP_ID_05:
+	case FAN53555_CHIP_ID_08:
 		di->vsel_min = 600000;
 		di->vsel_step = 10000;
 		break;