qcacmn: Set ssid and ssid_len when restart sap vdev

Set ssid and ssid_len when restart sap vdev. When hostapd set
ignore_broadcast_ssid to 1(zero-len) or 2(zero-content), when we force-scc
or setChanChange to restart sap vdev, if not set ssid and
ssid_len(default 0) in vdev start wmi, then firmware will reply
broadcast probe request since the ssid_len in broadcast probe req is 0
which matches the condition that firmware send probe response, however,
we should not reply with probe response.

Change-Id: I56580529e2b0db673c6b28c75094a7fd225cba77
CRs-Fixed: 2506391