UMTS: Fix invalid scambling length in uplink pilots
UMTS: Fix invalid scambling length in uplink pilots

Inconsistent length values lead to segmentation fault on DCH setup.

Signed-off-by: Tom Tsou <96835dd8bfa718bd6447ccc87af89ae1675daeca@tsou.cc>

flyhawk007/OpenBTS-UMTS,RangeNetworks/OpenBTS-UMTS,flyhawk007/OpenBTS-UMTS,RangeNetworks/OpenBTS-UMTS,flyhawk007/OpenBTS-UMTS,flyhawk007/OpenBTS-UMTS,RangeNetworks/OpenBTS-UMTS,RangeNetworks/OpenBTS-UMTS