Channel Context support

configname: CONFIG_ATH9K_CHANNEL_CONTEXT

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Channel Context support
In linux kernel since version 3.18 (release Date: 2014-12-07)  
This option enables channel context support in ath9k, which is needed
for multi-channel concurrency. Enable this if P2P PowerSave support
is required.