mac80211: make LED trigger names const

This is just a code cleanup, make the LED trigger names const
as they're not expected to be modified by drivers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 3314298..8a3a7d7 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3486,14 +3486,15 @@
 };
 
 #ifdef CONFIG_MAC80211_LEDS
-char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
-char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
-char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
-char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
-char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
-					 unsigned int flags,
-					 const struct ieee80211_tpt_blink *blink_table,
-					 unsigned int blink_table_len);
+const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
+const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
+const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
+const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
+const char *
+__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
+				   unsigned int flags,
+				   const struct ieee80211_tpt_blink *blink_table,
+				   unsigned int blink_table_len);
 #endif
 /**
  * ieee80211_get_tx_led_name - get name of TX LED
@@ -3507,7 +3508,7 @@
  *
  * Return: The name of the LED trigger. %NULL if not configured for LEDs.
  */
-static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
+static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
 {
 #ifdef CONFIG_MAC80211_LEDS
 	return __ieee80211_get_tx_led_name(hw);
@@ -3528,7 +3529,7 @@
  *
  * Return: The name of the LED trigger. %NULL if not configured for LEDs.
  */
-static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
+static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
 {
 #ifdef CONFIG_MAC80211_LEDS
 	return __ieee80211_get_rx_led_name(hw);
@@ -3549,7 +3550,7 @@
  *
  * Return: The name of the LED trigger. %NULL if not configured for LEDs.
  */
-static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
+static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
 {
 #ifdef CONFIG_MAC80211_LEDS
 	return __ieee80211_get_assoc_led_name(hw);
@@ -3570,7 +3571,7 @@
  *
  * Return: The name of the LED trigger. %NULL if not configured for LEDs.
  */
-static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
+static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
 {
 #ifdef CONFIG_MAC80211_LEDS
 	return __ieee80211_get_radio_led_name(hw);
@@ -3591,7 +3592,7 @@
  *
  * Note: This function must be called before ieee80211_register_hw().
  */
-static inline char *
+static inline const char *
 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags,
 				 const struct ieee80211_tpt_blink *blink_table,
 				 unsigned int blink_table_len)