ath5k: clean up some comments

This fixes a few misspellings, word repetitions, and some grammar
nits in ath5k comments.  No code changes.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c
index 6284c38..c7c4465 100644
--- a/drivers/net/wireless/ath/ath5k/phy.c
+++ b/drivers/net/wireless/ath/ath5k/phy.c
@@ -115,7 +115,7 @@
 \**********************/
 
 /*
- * This code is used to optimize rf gain on different environments
+ * This code is used to optimize RF gain on different environments
  * (temperature mostly) based on feedback from a power detector.
  *
  * It's only used on RF5111 and RF5112, later RF chips seem to have
@@ -302,7 +302,7 @@
 }
 
 /* Perform gain_F adjustment by choosing the right set
- * of parameters from rf gain optimization ladder */
+ * of parameters from RF gain optimization ladder */
 static s8 ath5k_hw_rf_gainf_adjust(struct ath5k_hw *ah)
 {
 	const struct ath5k_gain_opt *go;
@@ -367,7 +367,7 @@
 	return ret;
 }
 
-/* Main callback for thermal rf gain calibration engine
+/* Main callback for thermal RF gain calibration engine
  * Check for a new gain reading and schedule an adjustment
  * if needed.
  *
@@ -433,7 +433,7 @@
 	return ah->ah_gain.g_state;
 }
 
-/* Write initial rf gain table to set the RF sensitivity
+/* Write initial RF gain table to set the RF sensitivity
  * this one works on all RF chips and has nothing to do
  * with gain_F calibration */
 int ath5k_hw_rfgain_init(struct ath5k_hw *ah, unsigned int freq)
@@ -496,7 +496,7 @@
 
 
 /*
- * Setup RF registers by writing rf buffer on hw
+ * Setup RF registers by writing RF buffer on hw
  */
 int ath5k_hw_rfregs_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
 		unsigned int mode)
@@ -571,7 +571,7 @@
 		return -EINVAL;
 	}
 
-	/* If it's the first time we set rf buffer, allocate
+	/* If it's the first time we set RF buffer, allocate
 	 * ah->ah_rf_banks based on ah->ah_rf_banks_size
 	 * we set above */
 	if (ah->ah_rf_banks == NULL) {
@@ -3035,9 +3035,6 @@
 	/* Limit max power if we have a CTL available */
 	ath5k_get_max_ctl_power(ah, channel);
 
-	/* FIXME: Tx power limit for this regdomain
-	 * XXX: Mac80211/CRDA will do that anyway ? */
-
 	/* FIXME: Antenna reduction stuff */
 
 	/* FIXME: Limit power on turbo modes */