iwlwifi device svtool support

configname: CONFIG_IWLWIFI_DEVICE_SVTOOL

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>iwlwifi device svtool support
In linux kernel since version 3 (release Date: 2011-07-21)  
This option enables the svtool support for iwlwifi device through
NL80211_TESTMODE. svtool is a software validation tool that runs in
the user space and interacts with the device in the kernel space
through the generic netlink message via NL80211_TESTMODE channel.