Wrap the MIMO stuff in #ifdef AH_SUPPORT_AR5416, as the channel

state doesn't have MIMO stuff in it by default.

sys/dev/ath/ath_hal/ah.c

@@ -906,6 +906,7 @@ ath_hal_get_mimo_chan_noise(struct ath_hal *ah,
     const struct ieee80211_channel *chan, int16_t *nf_ctl,
     int16_t *nf_ext)
 {
+#ifdef	AH_SUPPORT_AR5416
 	HAL_CHANNEL_INTERNAL *ichan;
 	int i;
 
@@ -960,6 +961,9 @@ ath_hal_get_mimo_chan_noise(struct ath_hal *ah,
 		}
 		return 1;
 	}
+#else
+	return 0;
+#endif	/* AH_SUPPORT_AR5416 */
 }
 
 /*