[Prism54-devel] CVS - Fix frequency reporting

[Margit Schubert-While]

Per $SUBJECT
         * prism54_get_freq is incorrectly returning channel
         * and not frequency. Wireless tools detect this, but
         * other programs do not, leading to insane reported
         * values. (As Jean documents, drivers should really be
         * reporting the frequency).

Example is wavemon.

Margit