clatd: use struct instead of direct u8[] for buffer (this will allow adding more headers) Note the ethernet header may or may not be present, so it has to stay as part of the payload. Test: TreeHugger Bug: 265591307 Signed-off-by: Maciej Żenczykowski <[email protected]> Change-Id: I4e64fd1d15ac26ebb7a41ee9884b506625018fda