bts: Verify SI3 GPRS indication reflects PCU interface status

When no PCU is connected to the BTS, the BTS should mask the GPRS
indicator from the SI3 rest octets to indicate "no GPRS support"
in the cell.  This will cause phones not even trying to send us
RACH requests for GPRS ATTACH, RAU, etc.

Change-Id: I37efb712ee0c513aea230beeb35e7dabce698a34
Related: OS#4023
Related: OS#3075
1 file changed