Add support for VSC to clear legacy adv memory

nimble/host/include/host/ble_esp_gap.h

@@ -179,8 +179,14 @@ int ble_gap_set_auto_pcl_param(struct ble_gap_set_auto_pcl_params *params);
  *
  * @return                0 on success; nonzero on failure.
  */
-
 int ble_gap_duplicate_exception_list(uint8_t subcode, uint8_t type, uint8_t *value, void *cb);
+
+/**
+ * This API is used to clean up residue memory in controller for legacy advertisement
+ *
+ * @return                0 on success; nonzero on failure.
+ */
+int ble_gap_clear_legacy_adv(void);
 #endif
 
 #ifdef __cplusplus

nimble/host/src/ble_gap.c

@@ -7480,6 +7480,12 @@ ble_gap_duplicate_exception_list(uint8_t subcode, uint8_t type, uint8_t *value,
     return ble_hs_hci_send_vs_cmd(BLE_HCI_OCF_VS_DUPLICATE_EXCEPTION_LIST,
                                 &device_info_array, sizeof(device_info_array), NULL, 0);
 }
+
+int ble_gap_clear_legacy_adv(void)
+{
+     return ble_hs_hci_send_vs_cmd(BLE_HCI_OCF_VS_LEGACY_ADV_CLEAR,
+		            NULL, 0, NULL, 0);
+}
 #endif
 
 int

nimble/include/nimble/hci_common.h

@@ -1223,6 +1223,8 @@ struct ble_hci_vs_duplicate_exception_list_cp {
     uint8_t device_info[6];
 } __attribute__((packed));
 
+#define BLE_HCI_OCF_VS_LEGACY_ADV_CLEAR                 (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x010C))
+
 /* Command Specific Definitions */
 /* --- Set controller to host flow control (OGF 0x03, OCF 0x0031) --- */
 #define BLE_HCI_CTLR_TO_HOST_FC_OFF         (0)