Mellanox Technologies subfunction device support using auxiliary device

configname: CONFIG_MLX5_SF

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Mellanox Technologies subfunction device support using auxiliary device
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Build support for subfuction device in the NIC. A Mellanox subfunction
device can support RDMA, netdevice and vdpa device.
It is similar to a SRIOV VF but it doesn't require SRIOV support.