spi: Use dev_get_drvdata at appropriate places

Use dev_get_drvdata() instead of platform_get_drvdata(to_platform_device(dev)).

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index 6d0df50..f2b548f 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -480,8 +480,7 @@
 #ifdef CONFIG_PM
 static int bcm63xx_spi_suspend(struct device *dev)
 {
-	struct spi_master *master =
-			platform_get_drvdata(to_platform_device(dev));
+	struct spi_master *master = dev_get_drvdata(dev);
 	struct bcm63xx_spi *bs = spi_master_get_devdata(master);
 
 	spi_master_suspend(master);
@@ -493,8 +492,7 @@
 
 static int bcm63xx_spi_resume(struct device *dev)
 {
-	struct spi_master *master =
-			platform_get_drvdata(to_platform_device(dev));
+	struct spi_master *master = dev_get_drvdata(dev);
 	struct bcm63xx_spi *bs = spi_master_get_devdata(master);
 
 	clk_prepare_enable(bs->clk);