CONFIG_RTLWIFI_USB (not configurable)

modulename: rtl_usb.ko

configname: CONFIG_RTLWIFI_USB

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Realtek rtlwifi family of devices
└─>RTLWIFI_USB
In linux kernel since version 3.11 (release Date: 2013-09-02)  
source code:
drivers/net/wireless/realtek/rtlwifi/

is depended by
CONFIG_RTL8192CU