Fast fix of sms delivery problem.

If we receive UA frame in LinkEstablished state, we should just ignore this frame.
Actually sms delivery problem is related with using filler table for SDCCH channel in transceiver.
umtrx: set timing offset and clocking frequency

Measured offset and set to zero based on Nokia 3120 handset.

Signed-off-by: Thomas Tsou <tom@tsou.cc>