In the api hdd_set_nss_params() and hdd_set_antenna_mode()
change in nss parameter or antenna mode cause the TDLS
teardown.
Add a check in api hdd_set_nss_params() and
hdd_set_antenna_mode() to prevent change in parameter
if there is a existing TDLS connection.
Change-Id: I8a58b8b0a617a8de490907e4c3181b15d90e0dbb
CRs-Fixed: 3789892