serial: uartlite: Add support for debug console

Add support for debug console.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Thomas Chou <thomas@wytron.com.tw>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 83068cf..e78c5d3 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -112,6 +112,13 @@
 	  will need to provide parameters to make this work. The driver will
 	  be available until the real driver-model serial is running.
 
+config DEBUG_UART_UARTLITE
+	bool "Xilinx Uartlite"
+	help
+	  Select this to enable a debug UART using the serial_uartlite driver.
+	  You will need to provide parameters to make this work. The driver will
+	  be available until the real driver-model serial is running.
+
 config DEBUG_UART_ZYNQ
 	bool "Xilinx Zynq"
 	help