ath6kl: implement ath6kl_cfg80211_suspend()

This is in preparation for cutpower suspend feature. HIF layer makes
the decision based on information provided by cfg80211 and what hardware
actually supports. Then it calls ath6kl_cfg80211_suspend() to enable
the chosen mode.

Functionality should be the same, this is just preparation for
more suspend modes (cutpower and wow).

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index 2d15557..75b1eaa 100644
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -757,19 +757,14 @@
 		return ret;
 	}
 
-	ath6kl_deep_sleep_enable(ar);
+	ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP);
 
 	return 0;
 }
 
 static int ath6kl_sdio_resume(struct ath6kl *ar)
 {
-	if (ar->wmi->pwr_mode != ar->wmi->saved_pwr_mode) {
-		if (ath6kl_wmi_powermode_cmd(ar->wmi, 0,
-			ar->wmi->saved_pwr_mode) != 0)
-			ath6kl_warn("ath6kl_sdio_resume: "
-				"wmi_powermode_cmd failed\n");
-	}
+	ath6kl_cfg80211_resume(ar);
 
 	return 0;
 }