rate_ctr: Use ':' as separator, not '.'

In more recent versions of libosmocore, we are converting any '.'
in [rate] counter names to ':' to avoid clashes with the special
meaning of '.' in the CTRL interface.  Let's avoid any conversion
and use the proper name already here.

This also changes the codec_foo counters to codec:foo to follow the
notation of other counters.

Change-Id: I18916abbfc706b86bd211e7cca1a0ca3099826e9
1 file changed