qcacmn: Add _IS_ML flag attribute to the ADD_STA_NODE QCA vendor command

Add an attribute QCA_WLAN_VENDOR_ATTR_ADD_STA_NODE_IS_ML to the
ADD_STA_NODE command. If this attribute is set, it implies that the node
being added is an MLD node.

Change-Id: I5a8f7248847d14d87116592f0a6de3952aee8664
CRs-Fixed: 3594263

os_if/linux/qca_vendor.h

@@ -11968,6 +11968,12 @@ enum qca_wlan_vendor_attr_add_sta_node_params {
 	 */
 	QCA_WLAN_VENDOR_ATTR_ADD_STA_NODE_AUTH_ALGO = 2,
 
+	/*
+	 * This flag attribute is set if the node being added is an
+	 * MLD STA node.
+	 */
+	QCA_WLAN_VENDOR_ATTR_ADD_STA_NODE_IS_ML = 3,
+
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_ADD_STA_NODE_PARAM_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_ADD_STA_NODE_PARAM_MAX =