mlx5: Add new timestamp mode bits.

These fields declare which timestamp mode is supported
by the device per RQ/SQ/QP.

In addition add the ts_format field to the select the mode
for RQ/SQ/QP.

Linux commit:
a6a217dddcd544f6b75f0e2a60b6e84c1d494b7e

Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking

(cherry picked from commit 915fc66cb59faa543b852083233729c270d5aa3b)