When RD ETSI11 is configued, 5G HT40 channels are getting built for
low band channel frequencies. As per regulatory update #31,
this is not allowed.
To fix this issue, add a new field max_bw that indicates the maximum
supported bandwidth by a regdomain. Add max_bw values for all 2G and
5G regdomains definitions. Also pick bandwidth between reg-domain's
max_bw and country's max_bw.
Change-Id: Ie0e9f9c7d9ae21eea2bc534626ef7a13602577bb
CRs-Fixed: 2682424
4f9a6b9016