apps/bttester: refactor GATT Client service

Accomodated to new API.

apps/bttester/src/btp/btp_gattc.h

@@ -34,6 +34,9 @@ struct btp_gattc_read_supported_commands_rp {
 } __packed;
 
 #define BTP_GATTC_EXCHANGE_MTU        0x02
+struct btp_gattc_exchange_mtu_cmd {
+    ble_addr_t address;
+} __packed;
 
 #define BTP_GATTC_DISC_ALL_PRIM_SVCS    0x03
 struct btp_gattc_disc_all_prim_svcs_cmd {

apps/bttester/src/btp/bttester.h

@@ -100,9 +100,6 @@ uint8_t
 tester_init_gatt(void);
 uint8_t
 tester_unregister_gatt(void);
-void
-tester_handle_gattc(uint8_t opcode, uint8_t *data,
-                    uint16_t len);
 int
 tester_gattc_notify_rx_ev(uint16_t conn_handle, uint16_t attr_handle,
                           uint8_t indication, struct os_mbuf *om);
@@ -128,7 +125,10 @@ tester_init_mesh(void);
 uint8_t
 tester_unregister_mesh(void);
 #endif /* MYNEWT_VAL(BLE_MESH) */
-
+uint8_t
+tester_init_gatt_cl(void);
+uint8_t
+tester_unregister_gatt_cl(void);
 void
 gatt_svr_register_cb(struct ble_gatt_register_ctxt *ctxt, void *arg);
 

apps/bttester/src/btp_core.c

@@ -101,6 +101,9 @@ register_service(const void *cmd, uint16_t cmd_len,
     case BTP_SERVICE_ID_MESH:
         status = tester_init_mesh();
         break;
+    case BTP_SERVICE_ID_GATTC:
+        status = tester_init_gatt_cl();
+        break;
 #endif /* MYNEWT_VAL(BLE_MESH) */
     default:
         status = BTP_STATUS_FAILED;
@@ -148,6 +151,9 @@ unregister_service(const void *cmd, uint16_t cmd_len,
         status = tester_unregister_mesh();
         break;
 #endif /* MYNEWT_VAL(BLE_MESH) */
+    case BTP_SERVICE_ID_GATTC:
+        status = tester_unregister_gatt_cl();
+        break;
     default:
         status = BTP_STATUS_FAILED;
         break;