nios2: 10m50: change to ns16550 uart

Change to ns16550 uart for 10m50 devboard based on a new
Altera release.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/nios2/dts/10m50_devboard.dts

@@ -262,6 +262,6 @@
 
 	chosen {
 		bootargs = "debug console=ttyS0,115200";
-		stdout-path = &uart_0;
+		stdout-path = &a_16550_uart_0;
 	};
 };

configs/10m50_defconfig

@@ -22,6 +22,6 @@ CONFIG_MTD=y
 CONFIG_ALTERA_QSPI=y
 CONFIG_DM_ETH=y
 CONFIG_ALTERA_TSE=y
-CONFIG_ALTERA_UART=y
+CONFIG_SYS_NS16550=y
 CONFIG_TIMER=y
 CONFIG_ALTERA_TIMER=y

include/configs/10m50_devboard.h

@@ -20,6 +20,7 @@
  */
 #define CONFIG_BAUDRATE			115200
 #define CONFIG_SYS_CONSOLE_INFO_QUIET	/* Suppress console info */
+#define CONFIG_SYS_NS16550_MEM32
 
 /*
  * Flash