Atheros bluetooth coexistence support

configname: CONFIG_ATH9K_BTCOEX_SUPPORT

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Atheros bluetooth coexistence support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say Y, if you want to use the ath9k/ath9k_htc radios together with
Bluetooth modules in the same system.