Log different timestamps with only one sv_timestamp_logger

[eroussy]

Currently, sv_timestamp_logger is capable of logging the hardware timestamp and the userspace timestamp. However, if you want to log both, you must launch two instances of sv_timestamp_logger.

The tool should be modified to be able to log

• The hardware timestamp
• The driver timestamp
• The user space timestamp
  within one instance.

All of these timestamps must be logged in a different file, that will have the same formatting as today.

TODO:

• Add an option to log the driver timestamp
• Modify the arguments so that the user provide one file name for each timestamp type (hw, driver, userspace)
  This will break the API, so may be we shoud tag first.