meta-evb-ast2600: Add an new convenience layer for OpenBMC AST2600 EVB

This commit has been verified with AST2600A1 EVB with the image created
by the following command:

TEMPLATECONF=meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf . openbmc-env
bitbake obmc-phosphor-image

(From meta-evb rev: 9ec0661731103f703660aa65b5806a126a4f69fb)

Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Change-Id: Ie928880ed77ea77cecb33a900092f6ffc5454fb8
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf
new file mode 100644
index 0000000..2a88b8a
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf
@@ -0,0 +1,11 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have recipes-* directories, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+            ${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "meta-evb-ast2600"
+BBFILE_PATTERN_meta-evb-ast2600 = "^${LAYERDIR}/"
+
+LAYERSERIES_COMPAT_meta-evb-ast2600 = "dunfell gatesgarth"