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/hrcon_dh_defconfig b/configs/hrcon_dh_defconfig
index a059dd9..aad015a 100644
--- a/configs/hrcon_dh_defconfig
+++ b/configs/hrcon_dh_defconfig
@@ -1,5 +1,5 @@
-CONFIG_SYS_EXTRA_OPTIONS="HRCON_DH"
-
 CONFIG_PPC=y
 CONFIG_MPC83xx=y
 CONFIG_TARGET_HRCON=y
+CONFIG_SYS_EXTRA_OPTIONS="HRCON_DH"
+CONFIG_SYS_NS16550=y