fixup for Osmocom_CTRL_Functions: rate counters in bulk

At the time of writing Ief0d9b096feeee7d37b5f2429dd3e80de0161806 I wasn't aware
of the 'inout' keyword, which allows to pass the counter list by reference.

Rather modify the counter lists in-place. Instead of requiring

  list := f_counter_name_vals_add(list, ...)

rather implement by directly modifying list:

  f_counter_name_vals_add(list, ...)

Change-Id: I85ac56b042fe4bb1db392c1f451c8e900582cc2a
2 files changed