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/Auxtek-T004_defconfig b/configs/Auxtek-T004_defconfig
index 434b007..1d44a74 100644
--- a/configs/Auxtek-T004_defconfig
+++ b/configs/Auxtek-T004_defconfig
@@ -11,4 +11,5 @@
 # CONFIG_CMD_FPGA is not set
 CONFIG_CMD_GPIO=y
 CONFIG_AXP152_POWER=y
+CONFIG_SYS_NS16550=y
 CONFIG_USB_EHCI_HCD=y