Some IOT APs set supported rates to zero in probe response. Host uses
probe response/beacon to update scan cache. Host uses supported rates
from scan cache to update in assoc request.
As the supported rates in probe response are zeros, host doesn't
add supported rate IE in assoc request which leads to association
failure. Hence add BSS basic rates in assoc request if supported
rates in scan cache is not present.
Change-Id: Ie2d75a980f5aede0b7985ddf385516a6b15c7560
CRs-Fixed: 2706797
f9dc5f972f