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/P1020UTM-PC_SDCARD_defconfig b/configs/P1020UTM-PC_SDCARD_defconfig
index 650ffe5..1906da7 100644
--- a/configs/P1020UTM-PC_SDCARD_defconfig
+++ b/configs/P1020UTM-PC_SDCARD_defconfig
@@ -5,3 +5,4 @@
 CONFIG_SYS_EXTRA_OPTIONS="P1020UTM,SDCARD"
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
+CONFIG_SYS_NS16550=y