PTP support for Marvell 88E6xxx

configname: CONFIG_NET_DSA_MV88E6XXX_PTP

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Distributed Switch Architecture drivers
└─>PTP support for Marvell 88E6xxx
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y to enable PTP hardware timestamping on Marvell 88E6xxx switch
chips that support it.