qcacld-3.0: change weighed_valid_list to 0 for non-pcl entries

In function wlan_hdd_populate_weigh_pcl weight is populated
to 0 only if weighed_valid_list is 0 otherwise weight of
non-pcl entries will be populated as 20 less than weight
of last pcl entry but weighed_valid_list is set to 1 in
policy_mgr_get_valid_chan_weights. So, non-pcl entries
are also sent to upper layer.

Fix is to change weighed_valid_list to 0,
if there is existing p2p connection.

Change-Id: Ic0d86021c00fd95e5bc20eeabea56e2a69658599
CRs-Fixed: 3140467