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>
diff --git a/include/configs/10m50_devboard.h b/include/configs/10m50_devboard.h
index 48d5063..8a91cdb 100644
--- a/include/configs/10m50_devboard.h
+++ b/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