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/kmtepr2_defconfig b/configs/kmtepr2_defconfig
index 5cffd53..a4427ac 100644
--- a/configs/kmtepr2_defconfig
+++ b/configs/kmtepr2_defconfig
@@ -1,4 +1,5 @@
-CONFIG_SYS_EXTRA_OPTIONS="KMTEPR2"
 CONFIG_PPC=y
 CONFIG_MPC83xx=y
 CONFIG_TARGET_TUXX1=y
+CONFIG_SYS_EXTRA_OPTIONS="KMTEPR2"
+CONFIG_SYS_NS16550=y