ns16550: move CONFIG_SYS_NS16550 to Kconfig

Move CONFIG_SYS_NS16550 to Kconfig, and run moveconfig.py.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
diff --git a/configs/MPC8313ERDB_66_defconfig b/configs/MPC8313ERDB_66_defconfig
index ed498de..583fde8 100644
--- a/configs/MPC8313ERDB_66_defconfig
+++ b/configs/MPC8313ERDB_66_defconfig
@@ -4,3 +4,4 @@
 CONFIG_SYS_EXTRA_OPTIONS="SYS_66MHZ"
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_SYS_NS16550=y