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+Nuvoton NPCM7xx PCI mail box interface
+
+Nuvoton BMC NPCM7xx PCI mail box, The mailbox is a high-bandwidth
+communication module between the BMC CPU and host CPU.
+
+Required properties for lpc_bpc node
+- compatible : "nuvoton,npcm750-pci-mbox" for Poleg NPCM7XX.
+- reg : specifies two address space
+ 1. physical base address and size of the registers.
+ 2. physical base address and size of the dual-ported RAM.
+- interrupts : contain the PCI mail box interrupt with flags for falling edge.
+
+Example:
+ pcimbox: pcimbox@f0848000 {
+ compatible = "nuvoton,npcm750-pci-mbox", "simple-mfd", "syscon";
+ reg = <0xf084C000 0x8
+ 0xf0848000 0x3F00>;
+ interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+ };