[PATCH 38/42] mfd: twl6040: use PLATFORM_DEVID_NONE

[Krzysztof Kozlowski]

Use PLATFORM_DEVID_NONE define instead of "-1" value because:
 - it brings some meaning,
 - it might point attention why auto device ID was not used.

Signed-off-by: Krzysztof Kozlowski <krzk at kernel.org>
---
 drivers/mfd/twl6040.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
index b9c6d94b4002..702f9e216d42 100644
--- a/drivers/mfd/twl6040.c
+++ b/drivers/mfd/twl6040.c
@@ -794,8 +794,8 @@ static int twl6040_probe(struct i2c_client *client,
 	regcache_cache_only(twl6040->regmap, true);
 	regcache_mark_dirty(twl6040->regmap);
 
-	ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
-			      NULL, 0, NULL);
+	ret = mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE, twl6040->cells,
+			      children, NULL, 0, NULL);
 	if (ret)
 		goto readyirq_err;
 
-- 
2.17.1