修改串口引脚由sdk_config.h配置

components/libraries/log/src/nrf_log_backend_uart.c

@@ -58,7 +58,7 @@ uint32_t g_nrf_log_tx_pin = NRF_UART_PSEL_DISCONNECTED;
 static void uart_init(bool async_mode)
 {
     nrf_drv_uart_config_t config = NRF_DRV_UART_DEFAULT_CONFIG;
-    config.pseltxd  = g_nrf_log_tx_pin;
+    config.pseltxd  = NRF_LOG_BACKEND_UART_TX_PIN;
     config.pselrxd  = NRF_UART_PSEL_DISCONNECTED;
     config.pselcts  = NRF_UART_PSEL_DISCONNECTED;
     config.pselrts  = NRF_UART_PSEL_DISCONNECTED;