libwifi: mtk: use bw values in MHz instead of enum
According API description bandwith should be presented in MHz.
Remove inconsistency between API description in wifi.h (bandwidth is
listen in MHz) and enum implementation (bw as enum).
Signed-off-by: Bartlomiej Grzeskowiak bartlomiej.grzeskowiak@iopsys.eu
Edited by Bartlomiej Grzeskowiak