QMI proto setup-handler will wait forever if it is unable to registrate to
the mobile network. To fix this stop polling network registration status
and notify netifd. Netifd will generate then a "ifup-failed" ACTION.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
(backported from dec1bfa0f48d43174921d1a1357a4842f9ba0cf6)