PTP failed to sync because of "enabled" parameter passed.
It was passed as a boolean and ingnored by SysInv API.
Need to convert it to string before passing to SysInv.
Change-Id: Ice439bcb46bc901390c562f4ca5a8af0a73b738e
Closes-Bug: 1791997
Signed-off-by: Alex Kozyrev <alex.kozyrev@windriver.com>