media: staging: media: imx: imx7-mipi-csis: simplify getting .driver_data

We should get 'driver_data' from 'struct device' directly. Going via
platform_device is an unneeded step back and forth.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NRui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/staging/media/imx/imx7-mipi-csis.c

@@ -1027,8 +1027,7 @@ static int mipi_csis_probe(struct platform_device *pdev)
 
 static int mipi_csis_pm_suspend(struct device *dev, bool runtime)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct v4l2_subdev *mipi_sd = platform_get_drvdata(pdev);
+	struct v4l2_subdev *mipi_sd = dev_get_drvdata(dev);
 	struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
 	int ret = 0;
 
@@ -1052,8 +1051,7 @@ static int mipi_csis_pm_suspend(struct device *dev, bool runtime)
 
 static int mipi_csis_pm_resume(struct device *dev, bool runtime)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct v4l2_subdev *mipi_sd = platform_get_drvdata(pdev);
+	struct v4l2_subdev *mipi_sd = dev_get_drvdata(dev);
 	struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
 	int ret = 0;