spi: 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: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 5994039..fc190a5 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1340,7 +1340,7 @@
 		if (of_get_property(node, "ti,pindir-d0-out-d1-in", NULL))
 			mcspi->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN;
 	} else {
-		pdata = pdev->dev.platform_data;
+		pdata = dev_get_platdata(&pdev->dev);
 		master->num_chipselect = pdata->num_cs;
 		if (pdev->id != -1)
 			master->bus_num = pdev->id;