ath9k: Add a new debug flag for FFT spectral scan

FFT spectral scan is a functionality that makes sense to have its own
debug flag.

Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath.h

@@ -251,6 +251,7 @@ void ath_printk(const char *level, const struct ath_common *common,
  * @ATH_DBG_DFS: radar datection
  * @ATH_DBG_WOW: Wake on Wireless
  * @ATH_DBG_DYNACK: dynack handling
+ * @ATH_DBG_SPECTRAL_SCAN: FFT spectral scan
  * @ATH_DBG_ANY: enable all debugging
  *
  * The debug level is used to control the amount and type of debugging output
@@ -280,6 +281,7 @@ enum ATH_DEBUG {
 	ATH_DBG_WOW		= 0x00020000,
 	ATH_DBG_CHAN_CTX	= 0x00040000,
 	ATH_DBG_DYNACK		= 0x00080000,
+	ATH_DBG_SPECTRAL_SCAN	= 0x00100000,
 	ATH_DBG_ANY		= 0xffffffff
 };