Add raspberrypi as a platform

Add configure files to build OpenBMC for Raspberrypi.

Resolves openbmc/openbmc#399

Change-Id: Ibc9ca0357b672c2af8436dc310bc1f10f7773c55
Signed-off-by: Yi Li <adamliyi@msn.com>
diff --git a/meta-openbmc-machines/meta-evb/meta-evb-raspberrypi/conf/conf-notes.txt b/meta-openbmc-machines/meta-evb/meta-evb-raspberrypi/conf/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-openbmc-machines/meta-evb/meta-evb-raspberrypi/conf/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image