ath5k: remove static calibration interval variable

Remove static variable ath5k_calinterval which was used as a constant. Use a
#define instead. Also we don't need ah_cal_intval.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index 1d7491c..a3019ee 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -202,6 +202,7 @@
 #define AR5K_TUNE_MAX_TXPOWER			63
 #define AR5K_TUNE_DEFAULT_TXPOWER		25
 #define AR5K_TUNE_TPC_TXPOWER			false
+#define ATH5K_TUNE_CALIBRATION_INTERVAL_FULL    10000   /* 10 sec */
 
 #define AR5K_INIT_CARR_SENSE_EN			1
 
@@ -1101,9 +1102,6 @@
 	/* Calibration timestamp */
 	unsigned long		ah_cal_tstamp;
 
-	/* Calibration interval (secs) */
-	u8			ah_cal_intval;
-
 	/* Software interrupt mask */
 	u8			ah_swi_mask;