Changes

Omit all-zero octets in MS Classmark 3

TS 24.008 Clause 10.5.7.1 allows us to omit all-zero octets at the end
of the information element. The decoder will add them if needed.

Older specs tell us to include the supported bands, a5 bits and radio
capability. Therefore we don't omit them, even if their encoded octets
are all-zero.

Change-Id: I3f05893e60f37f349b77fbd15a20b7708c4c3481

RSSI app: Use correct BSIC for RACH bursts

A regular RACH burst uses the BSIC of the cell. A 'UIC' (uplink identity
code) value is used for ASCI group calls. The value 0xff disables 'UIC'.

Fixes: 23d46f003 ("ASCI: Add UIC support to random access burst")

Change-Id: I63ed20160d9d45cbc3f70cec8b1c0af262fdde19

gsm/gsm_utils: Support the ER-GSM band (ARFCN 940..954)

Backport from libosmocore.git commit 28973f0d29

Change-Id: I2fbddc523e72c6d6134e8a9d8132ad58266ce0db