Bluetooth: Remove unnecessary casts of private_data in drivers

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/btmrvl_debugfs.c b/drivers/bluetooth/btmrvl_debugfs.c
index b50b41d..54739b0 100644
--- a/drivers/bluetooth/btmrvl_debugfs.c
+++ b/drivers/bluetooth/btmrvl_debugfs.c
@@ -216,7 +216,7 @@
 static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
 						size_t count, loff_t *ppos)
 {
-	struct btmrvl_private *priv = (struct btmrvl_private *) file->private_data;
+	struct btmrvl_private *priv = file->private_data;
 	char buf[16];
 	long result, ret;