If NetworkManager knows that firmware is missing, say so.
This matches recent changes in the gnome-shell network menu.
It adds one new string, "Firmware missing", for which I have
pulled existing translations from the similar "firmware missing"
string in gnome-shell.
https://bugzilla.gnome.org/show_bug.cgi?id=646027
A recent change to the NetworkManager API combined the
NM_DEVICE_TYPE_GSM and NM_DEVICE_TYPE_CDMA types as
NM_DEVICE_TYPE_MODEM and provided an alternative API for accessing the
modem device's capabilities (including GSM_UMTS and CDMA_EVDO).
https://bugzilla.gnome.org/show_bug.cgi?id=643390
Signed-off-by: Richard Hughes <richard@hughsie.com>