[bug] 修复drv_usart_v2.c

bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c

@@ -142,7 +142,7 @@ static void ra_uart_get_config(void)
     uart_obj[UART3_INDEX].uart_dma_flag = 0;
 
     uart_obj[UART3_INDEX].serial.config.rx_bufsz = BSP_UART3_RX_BUFSIZE;
-    uart_obj[UART3_INDEX].serial.config.tx_bufsz = BSP_UART0_TX_BUFSIZE;
+    uart_obj[UART3_INDEX].serial.config.tx_bufsz = BSP_UART3_TX_BUFSIZE;
 #endif
 
 #ifdef BSP_USING_UART4
@@ -153,6 +153,14 @@ static void ra_uart_get_config(void)
     uart_obj[UART4_INDEX].serial.config.tx_bufsz = BSP_UART4_TX_BUFSIZE;
 #endif
 
+#ifdef BSP_USING_UART5
+    uart_obj[UART5_INDEX].serial.config = config;
+    uart_obj[UART5_INDEX].uart_dma_flag = 0;
+
+    uart_obj[UART5_INDEX].serial.config.rx_bufsz = BSP_UART5_RX_BUFSIZE;
+    uart_obj[UART5_INDEX].serial.config.tx_bufsz = BSP_UART5_TX_BUFSIZE;
+#endif
+
 #ifdef BSP_USING_UART6
     uart_obj[UART6_INDEX].serial.config = config;
     uart_obj[UART6_INDEX].uart_dma_flag = 0;