ath6kl: Cleanup void *parent_dev in struct wmi

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index 6e4febf..9b06a82 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -2724,7 +2724,7 @@
 	spin_unlock_bh(&wmi->lock);
 }
 
-void *ath6kl_wmi_init(void *dev)
+void *ath6kl_wmi_init(struct ath6kl *dev)
 {
 	struct wmi *wmi;