dmaengine: bcm-sba-raid: Use dev_get_drvdata()

Using dev_get_drvdata directly.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/bcm-sba-raid.c

@@ -1459,8 +1459,7 @@ static void sba_receive_message(struct mbox_client *cl, void *msg)
 
 static int sba_debugfs_stats_show(struct seq_file *file, void *offset)
 {
-	struct platform_device *pdev = to_platform_device(file->private);
-	struct sba_device *sba = platform_get_drvdata(pdev);
+	struct sba_device *sba = dev_get_drvdata(file->private);
 
 	/* Write stats in file */
 	sba_write_stats_in_seqfile(sba, file);