net: thunderbolt: Add debugging when sending/receiving control packets

These can be useful when debugging possible issues around USB4NET
control packet exchange.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <YehezkelShB@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>