qcacld-3.0: Add check for STA disconnect in pe disconnect cb

In PE layer, STA session's mlme state check is added to avoid race
between NB disconnect and SB disconnect from emergency roaming disconnect.

In pe_disconnect_cb, if session's mlme state is already disconnecting no
need to send tear down link with AP.

Change-Id: I096b44167d65aa307e6685f07d42656d4e38a042
CRs-Fixed: 2627760
1 file changed