Atheros ath9k debugging

configname: CONFIG_ATH9K_DEBUGFS

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Atheros ath9k debugging
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Say Y, if you need access to ath9k's statistics for
interrupts, rate control, etc.

Also required for changing debug message flags at run time and for
TX99.