ath9k_hw: abstract loading noisefloor

This is the last call on calib.c which acceses PHY stuff,
with this change we calib.c is now generic between both
all supported hardware families.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 7a32733..d28a904 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -486,6 +486,7 @@
  *	AR_RTC_PLL_CONTROL for a given channel
  * @setup_calibration: set up calibration
  * @iscal_supported: used to query if a type of calibration is supported
+ * @loadnf: load noise floor read from each chain on the CCA registers
  */
 struct ath_hw_private_ops {
 	/* Calibration ops */
@@ -528,6 +529,7 @@
 	bool (*ani_control)(struct ath_hw *ah, enum ath9k_ani_cmd cmd,
 			    int param);
 	void (*do_getnf)(struct ath_hw *ah, int16_t nfarray[NUM_NF_READINGS]);
+	void (*loadnf)(struct ath_hw *ah, struct ath9k_channel *chan);
 };
 
 /**