GSUP_Types: Split RAT_TYPE_IE to SUPPORTED / CURRENT

We added the RAT_TYPE_IE while the respective change in libosmocore
was still in gerrit review.  Meanwhile the support there has been
split into two parts: A list of supported radio access types and
another IE indicating the current RAT.  Let's catch up with that
in the GSUP implementation.

This makes TC_gsup_sai_eps() pass again.

Change-Id: I2c609dc523cbec562c6c6a05f4c7d600649ff52d
1 file changed