Correctly load the list of basic_rates from UCI. basic-rates shall be
stored as a option-list. The current code did not retrieve this list
correctly.
wpa_supplicant uses a different config option to set basic-rates
when operating in mesh-mode.
Use the correct config key and calculation for mesh-interfaces.
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit a854d833ea)