ptpd: add FSL QorIQ DPAA and eTSEC support

This patch is for Freescale QorIQ DPAA and eTSEC which support 1588 hardware
assist module, and mainly uses SO_TIMESTAMPING API for HW timestamp and PHC
API.

Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: Zhenhua Luo <zhenhua.luo@freescale.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>