[bsp/qemu-riscv]修正打开串口后中断被关闭的问题 (#9035)

bsp/qemu-virt64-riscv/driver/drv_uart.c

@@ -52,7 +52,6 @@ void uart_init(void)
 
 static rt_err_t _uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
 {
-    uart_init();
     return (RT_EOK);
 }