The parameter identifiers used in the implementation of
lim_set_active_edca_params() differ from the ones used in the
prototype. Since this can be confusing for both humans and code
analysis tools, harmonize on the parameters used in the
implementation. In addition, relocate the documentation so that it is
the interface that is documented and not the implementation.
Change-Id: Ie352f40ca86a9816d19f6e37b52058e884814202
CRs-Fixed: 2376126