Add support for Telit LE910Cx 0x1230 composition:

0x1230: tty, adb, rmnet, audio, tty, tty, tty, tty
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Link: https://lore.kernel.org/r/20201102110108.17244-1-dnlplm@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>