iwlwifi: dvm: fix chain noise calibration

First step of chain noise calibration process had disable flag
check inverted. Chain noise calibration never started because
of this.

Tested on intel 5300 with two antennas attached. The driver
correctly disabled one chain.

Cc: stable@vger.kernel.org
Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/dvm/rxon.c b/drivers/net/wireless/iwlwifi/dvm/rxon.c
index 707446f..cd1ad001 100644
--- a/drivers/net/wireless/iwlwifi/dvm/rxon.c
+++ b/drivers/net/wireless/iwlwifi/dvm/rxon.c
@@ -1378,7 +1378,7 @@
 	struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 	int ret;
 
-	if (!(priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED))
+	if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
 		return;
 
 	if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&