leds: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index edf485b..c3a08b6 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -267,7 +267,7 @@
 
 	chip = &pca955x_chipdefs[id->driver_data];
 	adapter = to_i2c_adapter(client->dev.parent);
-	pdata = client->dev.platform_data;
+	pdata = dev_get_platdata(&client->dev);
 
 	/* Make sure the slave address / chip type combo given is possible */
 	if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) !=