BugLink: http://bugs.launchpad.net/bugs/1752536

We ship this firmware but it fails to load because it is not
present in the initrd. Add a MODULE_FIRMWARE statement to fix
this.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>