meta-ibm: p10bmc: add a MCTP DISTRO_FEATURES switch

The switch enables AF_MCTP and adds the `mctp` tool and `mctpd` so we
can setup and manage an in-kernel MCTP network.

Enable it for p10bmc and also add CONFIG_TUN so we can use a tun device
to transport packets between the kernel and the astlpc interface
implemented in libmctp.

Change-Id: I21d0af9e751f91975c760b4b4708b3b401b95417
Signed-off-by: Rashmica Gupta <rashmica@linux.ibm.com>
diff --git a/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb b/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
index 7759b7e..19e256c 100644
--- a/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
+++ b/meta-phosphor/recipes-phosphor/images/obmc-phosphor-image.bb
@@ -45,6 +45,7 @@
         obmc-network-mgmt \
         obmc-settings-mgmt \
         obmc-telemetry \
+        obmc-dmtf-pmci \
         "
 # The shadow recipe provides the binaries(like useradd, usermod) needed by the
 # phosphor-user-manager.