Create phosphor-mmc distro feature

Create a distro feature for building images for a mmc chip. This
distro feature would allow to add/remove packages that only apply
to mmc.

(From meta-phosphor rev: 3633bca4309f6aa0417aa86e74f8b39e4d750528)

Change-Id: Icf5c39d7f66fd662dc02479263b67ef674b4b232
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-mmc.inc b/meta-phosphor/conf/distro/include/phosphor-mmc.inc
new file mode 100644
index 0000000..05d79c7
--- /dev/null
+++ b/meta-phosphor/conf/distro/include/phosphor-mmc.inc
@@ -0,0 +1,2 @@
+DISTRO_FEATURES += "phosphor-mmc"
+DISTROOVERRIDES .= ":df-phosphor-mmc"