ath6kl: move power control from sdio to core

In preparation for cutting down power from the chip on the fly.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath6kl/hif.h b/drivers/net/wireless/ath/ath6kl/hif.h
index 93d2912..ee7c31a 100644
--- a/drivers/net/wireless/ath/ath6kl/hif.h
+++ b/drivers/net/wireless/ath/ath6kl/hif.h
@@ -242,6 +242,8 @@
 	void (*cleanup_scatter)(struct ath6kl *ar);
 	int (*suspend)(struct ath6kl *ar);
 	int (*resume)(struct ath6kl *ar);
+	int (*power_on)(struct ath6kl *ar);
+	int (*power_off)(struct ath6kl *ar);
 };
 
 int ath6kl_hif_setup(struct ath6kl_device *dev);