meta-evb-nuvoton: add meta-evb-npcm845 layer for Arbel EVB

Create meta-evb-npcm845 layer under meta-evb-nuvoton then make "setup" script
looks for machine config files being present to know that the meta-layer
contains a valid machine for OpenBMC.

Also add symlinks for the machine config files from meta-nuvoton into
meta-evb-nuvoton so that setup recognizes them as valid machines, but
using the phosphor layers.

Tested:
/openbmc$ . setup evb-npcm845
Machine evb-npcm845 found in meta-evb/meta-evb-nuvoton/meta-evb-npcm845
Common targets are:
     obmc-phosphor-image

Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: I21de23ded94244bed52c571a8e68b38cf498fc54
diff --git a/meta-evb/meta-evb-nuvoton/meta-evb-npcm845/conf/layer.conf b/meta-evb/meta-evb-nuvoton/meta-evb-npcm845/conf/layer.conf
new file mode 100644
index 0000000..a1959cc
--- /dev/null
+++ b/meta-evb/meta-evb-nuvoton/meta-evb-npcm845/conf/layer.conf
@@ -0,0 +1,10 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have recipes-* directories, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+            ${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "evb-npcm845"
+BBFILE_PATTERN_evb-npcm845 = "^${LAYERDIR}/"
+LAYERSERIES_COMPAT_evb-npcm845 = "kirkstone langdale"