iwlwifi: fix unused variable warning

In the case of disabled CONFIG_IWLWIFI_DEBUGFS option the compiler complains
about the unused variable 'img'. Fix this by moving the 'img' definition.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-mac80211.c

@@ -438,7 +438,6 @@ static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 	unsigned long flags;
 	u32 base, status = 0xffffffff;
 	int ret = -EIO;
-	const struct fw_img *img;
 
 	IWL_DEBUG_MAC80211(priv, "enter\n");
 	mutex_lock(&priv->mutex);
@@ -459,6 +458,8 @@ static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 		if (ret == 0) {
+			const struct fw_img *img;
+
 			img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
 			if (!priv->wowlan_sram) {
 				priv->wowlan_sram =