iwlwifi: update comments on how to enable debug flag

Modify comments on how to enable and change debug_level

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/Kconfig b/drivers/net/wireless/iwlwifi/Kconfig
index e044103..57703d5 100644
--- a/drivers/net/wireless/iwlwifi/Kconfig
+++ b/drivers/net/wireless/iwlwifi/Kconfig
@@ -54,13 +54,13 @@
 	  control which debug output is sent to the kernel log by setting the
 	  value in
 
-		/sys/class/net/wlan0/device/debug_level
+		/sys/module/iwlwifi/parameters/debug
 
 	  This entry will only exist if this option is enabled.
 
 	  To set a value, simply echo an 8-byte hex value to the same file:
 
-		  % echo 0x43fff > /sys/class/net/wlan0/device/debug_level
+		  % echo 0x43fff > /sys/module/iwlwifi/parameters/debug
 
 	  You can find the list of debug mask values in:
 		  drivers/net/wireless/iwlwifi/iwl-debug.h