CVE-2017-5753 (Spectre v1 Intel -> upstream)
BugLink: http://bugs.launchpad.net/bugs/1754375

This reverts commit b9d71080
to be replaced by upstream changes.
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>