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/ls1043ardb_defconfig b/configs/ls1043ardb_defconfig
index a476360..3feac91 100644
--- a/configs/ls1043ardb_defconfig
+++ b/configs/ls1043ardb_defconfig
@@ -1,3 +1,4 @@
 CONFIG_ARM=y
 CONFIG_TARGET_LS1043ARDB=y
 CONFIG_SYS_EXTRA_OPTIONS="SYS_FSL_DDR4"
+CONFIG_SYS_NS16550=y