Tag driver for Broadcom legacy switches using in-frame headers

configname: CONFIG_NET_DSA_TAG_BRCM_LEGACY

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Distributed Switch Architecture
└─>Tag driver for Broadcom legacy switches using in-frame headers
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Say Y if you want to enable support for tagging frames for the
Broadcom legacy switches which place the tag after the MAC source
address.