openpower: use meta-phosphor provided overrides

OpenBMC is moving away from processor arch specific layers to supporting
multiple arches in a single layer (meta-phosphor).  To that end, a
handful of machine includes that set some machine overrides were added
to meta-phosphor for IBM POWER processors.

Include these new includes from our layer so that any existing
meta-openpower users pick up the new overrides.  This provides a path to
migrating meta-openpower content upstream to meta-phosphor.

Change-Id: Ic3e51838b2a3f8bcbde682d2321e28ee7be6aab7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/conf/machine/include/p8.inc b/conf/machine/include/p8.inc
index b43045d..af269c2 100644
--- a/conf/machine/include/p8.inc
+++ b/conf/machine/include/p8.inc
@@ -1 +1,2 @@
+include conf/machine/include/ibm-power8-cpu.inc
 OBMC_MACHINE_FEATURES += 'i2c-occ'