[rilmodem] Force GSM WCDMA configuration in very first start

There was a bug in previous solution where GSM WCDMA was set
only if previous configuration was defined. This fix forces
the GSM WCDMA configuration always if configured.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
Merge pull request #151 from jkangas/master

Request for pulling LTE configuration bug fix to main branch