ath9k: remove the noise floor value in the ani struct

common->ani.noise_floor is now only used for a similar redundant debug
message similar to the one that was removed from ath9k_htc in an earlier
patch. Remove it from ath9k as well now.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath.h

@@ -35,7 +35,6 @@ static const u8 ath_bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
 struct ath_ani {
 	bool caldone;
-	int16_t noise_floor;
 	unsigned int longcal_timer;
 	unsigned int shortcal_timer;
 	unsigned int resetcal_timer;

drivers/net/wireless/ath/ath9k/init.c

@@ -506,7 +506,6 @@ static void ath9k_init_misc(struct ath_softc *sc)
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	int i = 0;
 
-	common->ani.noise_floor = ATH_DEFAULT_NOISE_FLOOR;
 	setup_timer(&common->ani.timer, ath_ani_calibrate, (unsigned long)sc);
 
 	sc->config.txpowlimit = ATH_TXPOWER_MAX;

drivers/net/wireless/ath/ath9k/main.c

@@ -459,16 +459,6 @@ void ath_ani_calibrate(unsigned long data)
 						   ah->curchan,
 						   common->rx_chainmask,
 						   longcal);
-
-			if (longcal)
-				common->ani.noise_floor = ath9k_hw_getchan_noise(ah,
-								     ah->curchan);
-
-			ath_print(common, ATH_DBG_ANI,
-				  " calibrate chan %u/%x nf: %d\n",
-				  ah->curchan->channel,
-				  ah->curchan->channelFlags,
-				  common->ani.noise_floor);
 		}
 	}