thunderbolt: Do not unnecessarily call ICM get route

thunderbolt: Do not unnecessarily call ICM get route

BugLink: https://bugs.launchpad.net/bugs/1789358
This command is not really fast and can make resume time slower. We only
need to get route again if the link was changed and during initial
device connected message.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit fdd92e89a492142a113f270dcd7e490805922b71)
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Acked-by: Hui Wang <Wang <hui.wang@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>