cifs: update tcpStatus during negotiate and sess setup

Till the end of SMB session setup, update tcpStatus and
avoid updating session status field. There was a typo in
cifs_setup_session, which caused ses->status to be updated
instead. This was causing issues during reconnect.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>