meta-phosphor: nuvoton-layer: postd: add support for NPCM7xx BMC

Enable BIOS POST CODE functionality for NPCM7xx BMC in phosphor-host-postd.
We need to modify SNOOP_DEVICE = "npcm7xx-lpc-bpc0", due to default SNOOP_DEVICE is using aspeed BMC.

Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: Ia13ef09736280e98ff571e9ca5287d55c2dc7e16
diff --git a/nuvoton-layer/recipes-phosphor/host/phosphor-host-postd_%.bbappend b/nuvoton-layer/recipes-phosphor/host/phosphor-host-postd_%.bbappend
new file mode 100644
index 0000000..60d5610
--- /dev/null
+++ b/nuvoton-layer/recipes-phosphor/host/phosphor-host-postd_%.bbappend
@@ -0,0 +1,3 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+SNOOP_DEVICE = "npcm7xx-lpc-bpc0"