ath9k_hw: fix noisefloor timeout handling on AR9003

When the noisefloor calibration times out, do not load -50 into
the registers, since this might cause rx issues. Instead, leave
enough time for the noise floor calibration to complete until
the next check.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9003_phy.c

@@ -1093,6 +1093,7 @@ static void ar9003_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
 		ath_print(common, ATH_DBG_ANY, "Timeout while waiting for nf "
 			  "to load: AR_PHY_AGC_CONTROL=0x%x\n",
 			  REG_READ(ah, AR_PHY_AGC_CONTROL));
+		return;
 	}
 
 	/*