Merge pull request #57 from ptakalok/master

[rilmodem] map RIL LTE radio access technology constant to corresponding...
drivers/rilmodem: USSD query message from NW to MS

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
Merge pull request #58 from jpoutiai/master

drivers/rilmodem: USSD query message from NW to MS
[rilmodem]preferred RAT mode value mapping for new UI design

UI labels will change from '3G' to 'Prefer 3G'. Ofono-RIL constant values
need to be update accordingly

Signed-off-by: Petri Takalokastari <petri.takalokastari@oss.tieto.com>