In the api cm_roam_candidate_info_event(), the value of
throughput is sent in Mbps whereas throughput is expected
in Kbps
Correct this by converting the throughput to Kbps instead of
sending it in Mbps.
Change-Id: I0fe95efc3a02d43187ff2c0423813529687c2ee9
CRs-Fixed: 3224754