arm: nuvoton: Add support for Nuvoton NPCM750 BMC

Add basic support for the Nuvoton NPCM750 EVB (Poleg).

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index ad757e9..85c23bc 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -72,6 +72,7 @@
 machine-$(CONFIG_ARCH_MESON)		+= meson
 machine-$(CONFIG_ARCH_MVEBU)		+= mvebu
 machine-$(CONFIG_ARCH_NEXELL)		+= nexell
+machine-$(CONFIG_ARCH_NPCM)             += npcm
 machine-$(CONFIG_ARCH_OMAP2PLUS)	+= omap2
 machine-$(CONFIG_ARCH_ORION5X)		+= orion5x
 machine-$(CONFIG_ARCH_OWL)		+= owl