run(4): fix WME support (untested).

Now run(4) fetches parameters from ic->ic_wme.wme_params array, which is never initialized
(and can be safely removed). This patch replaces &ic->ic_wme.wme_params with
&ic->ic_wme.wme_chanParams.cap_wmeParams (contains parameters for local station;
used by other drivers with WME support).

Tested:

• me: STA: run0: MAC/BBP RT5390 (rev 0x0502), RF RT5370 (MIMO 1T1R), address 38:83:45:11:78:ae