Realtek protocol support

configname: CONFIG_BT_HCIBTUSB_RTL

Linux Kernel Configuration
└─>Networking support
└─>Bluetooth subsystem support
└─>Bluetooth device drivers
└─>Realtek protocol support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
The Realtek protocol support enables firmware and configuration
download support for Realtek Bluetooth controllers.

Say Y here to compile support for Realtek protocol.