meta-inspur: nf5280m7 Add new machine layer

the Inspur NF5280M7 is an x86 platform server with an AST2600-based BMC.

Tested: Built nf5280m7 and verified the image-bmc is generated.

Change-Id: Iab86a8682d1fc8f3320590e63613a22a14571fcd
Signed-off-by: Xiaoyu Ma <maxiaoyu@inspur.com>
diff --git a/meta-inspur/meta-nf5280m7/conf/templates/default/conf-notes.txt b/meta-inspur/meta-nf5280m7/conf/templates/default/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-inspur/meta-nf5280m7/conf/templates/default/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image