ms: Add current_pacch_slots method

The PACCH is specific to an MS and may change when a TBF is
established or removed (see TS 44.060, 8.1.1.2.2). For multislot
class type 2 phones, more than one timeslot may be used to transmit
RLC/MAC control messages.

Add a method that returns a set of TS which can be used for the
PACCH.

Sponsored-by: On-Waves ehf
3 files changed