Nimble: Expose API to clear all addresses in whitelist out of stack

nimble/host/include/host/ble_gap.h

@@ -2037,6 +2037,13 @@ int ble_gap_wl_set(const ble_addr_t *addrs, uint8_t white_list_count);
  */
 int ble_gap_wl_tx_rmv(const ble_addr_t *addrs);
 
+/**
+ * Clears all addresses from controller's white list.
+ *
+ * @return                      0 on success; nonzero on failure.
+ */
+int ble_gap_wl_tx_clear(void);
+
 /**
  * Initiates a connection parameter update procedure.
  *

nimble/host/src/ble_gap.c

@@ -2465,7 +2465,7 @@ ble_gap_wl_tx_add(const ble_addr_t *addr)
                              &cmd, sizeof(cmd), NULL, 0);
 }
 
-static int
+int
 ble_gap_wl_tx_clear(void)
 {
     return ble_hs_hci_cmd_tx(BLE_HCI_OP(BLE_HCI_OGF_LE,