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/strider_cpu_defconfig b/configs/strider_cpu_defconfig
index fc0a823..a0584b8 100644
--- a/configs/strider_cpu_defconfig
+++ b/configs/strider_cpu_defconfig
@@ -1,7 +1,8 @@
-CONFIG_SYS_EXTRA_OPTIONS="STRIDER_CPU"
 CONFIG_PPC=y
 CONFIG_MPC83xx=y
 CONFIG_TARGET_STRIDER=y
+CONFIG_SYS_EXTRA_OPTIONS="STRIDER_CPU"
 CONFIG_AUTOBOOT_KEYED=y
 CONFIG_AUTOBOOT_STOP_STR=" "
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_SYS_NS16550=y