ble_mesh: Remove useless CONFIG_BLE_MESH_NODE

For Low Power node and Proxy Server, the two features
depend on BLE_MESH_NODE in Kconfig.in, here in the
stack there is no need to judge if CONFIG_BLE_MESH_NODE
is enabled.

components/bt/esp_ble_mesh/mesh_core/net.c

@@ -789,13 +789,11 @@ int bt_mesh_net_resend(struct bt_mesh_subnet *sub, struct net_buf *buf,
         return err;
     }
 
-    if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
     if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) &&
         bt_mesh_proxy_relay(&buf->b, dst)) {
         send_cb_finalize(cb, cb_data);
         return 0;
     }
-    }
 
     bt_mesh_adv_send(buf, cb, cb_data);
     return 0;

components/bt/esp_ble_mesh/mesh_core/transport.c

@@ -457,12 +457,10 @@ static int send_seg(struct bt_mesh_net_tx *net_tx, struct net_buf_simple *sdu,
         send_cb_finalize(cb, cb_data);
     }
 
-    if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
     if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER) &&
         bt_mesh_lpn_established()) {
         bt_mesh_lpn_poll();
     }
-    }
 
     return 0;
 }
@@ -917,7 +915,6 @@ static int ctl_recv(struct bt_mesh_net_rx *rx, u8_t hdr,
         }
     }
 
-    if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
 #if defined(CONFIG_BLE_MESH_LOW_POWER)
     if (ctl_op == TRANS_CTL_OP_FRIEND_OFFER) {
         return bt_mesh_lpn_friend_offer(rx, buf);
@@ -941,7 +938,6 @@ static int ctl_recv(struct bt_mesh_net_rx *rx, u8_t hdr,
         }
     }
 #endif /* CONFIG_BLE_MESH_LOW_POWER */
-    }
 
     BT_WARN("Unhandled TransOpCode 0x%02x", ctl_op);
 
@@ -1477,14 +1473,12 @@ int bt_mesh_trans_recv(struct net_buf_simple *buf, struct bt_mesh_net_rx *rx)
      * requested the Friend to send them. The messages must also
      * be encrypted using the Friend Credentials.
      */
-    if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
     if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER) &&
         bt_mesh_lpn_established() && rx->net_if == BLE_MESH_NET_IF_ADV &&
         (!bt_mesh_lpn_waiting_update() || !rx->friend_cred)) {
         BT_WARN("Ignoring unexpected message in Low Power mode");
         return -EAGAIN;
     }
-    }
 
     /* Save the app-level state so the buffer can later be placed in
      * the Friend Queue.
@@ -1516,13 +1510,11 @@ int bt_mesh_trans_recv(struct net_buf_simple *buf, struct bt_mesh_net_rx *rx)
      * timer, in which case we want to reset the timer at this point.
      *
      */
-    if (IS_ENABLED(CONFIG_BLE_MESH_NODE) && bt_mesh_is_provisioned()) {
     if (IS_ENABLED(CONFIG_BLE_MESH_LOW_POWER) &&
         (bt_mesh_lpn_timer() ||
         (bt_mesh_lpn_established() && bt_mesh_lpn_waiting_update()))) {
         bt_mesh_lpn_msg_received(rx);
     }
-    }
 
     net_buf_simple_restore(buf, &state);