ms: Replace struct var with rate_ctr

Let's use usual osmocom rate_ctr instead of having one variable +
setter/getter functions, so we can easily add new counters and also
because it makes code more clear (no need to look at what the "update"
function is doing).

Using rate counter also provides info about how recently the MS has been
interacting with the network.

Related: OS#4907
Change-Id: I744507fde4291955c1dbbb9739b18a12a80145b1

0 files changed, 0 insertions, 0 deletions