[rdkb][common][hal][Fix uci set 2G bnad 11b not work]

[Description]
Fix uci set 2G bnad 11b not work.
1. For mode b we should set n and ax disable and set support legacy rates.
2. Refactor set supported_rates and basic_rates hal.

[Release-log]
N/A

Change-Id: Iea22ab36549e5c6d03c52cbbdc29ce801beb3171
1 file changed
tree: 7f49ce943329f99a3164e8332ccbb0627738b427
  1. src/