[Gentoo] Install QCA8171 driver and RTL8723BE driver

Jump into the linux source path.
cd /usr/src/linux


Configure configuration file under linux source path.
make menuconfig


Tick up the following settings.
Qualcomm Atheros QCA8171 Gigabit Ethernet

Device Drivers > Network device support > Ethernet driver support
> Qualcomm Atheros AR816x/AR817x support

Tick up the following settings.
Realtek RTL8723BE PCIe Wireless Network Adapter

Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
Device Drivers > Network device support > Wireless LAN > Realtek rtlwifi family of devices
> Realtek RTL8723BE PCIe Wireless Network Adapter

Start to compile kernel source.
make

Install kernel module
make modules_install