qcacmn: Don't drop the beacon/probe resp if rates IE does not present

Currently, beacon or probe responses are dropped by the scan module
if the rates IE does not present. But, some AP's in 11n mode does not
add the rates IE.
So, it is not mandatory to have the rates IE in the beacon or probe
response.

Change-Id: Id57b2216c012d117cca1a3a2dbce9825d58b67c3
CRs-Fixed: 2376710
1 file changed