Use OE reference qemuarm

 -Replace qemuphosphor sample bsp with reference qemuarm.
 -Pull in phosphor features via local.conf
diff --git a/conf/local.conf.sample b/conf/local.conf.sample
index e6b6d66..6a91927 100644
--- a/conf/local.conf.sample
+++ b/conf/local.conf.sample
@@ -34,7 +34,7 @@
 #MACHINE ?= "edgerouter"
 #
 # This sets the default machine to be qemux86 if no other machine is selected:
-MACHINE ??= "qemuphosphor"
+MACHINE ??= "qemuarm"
 
 #
 # Where to place downloads
@@ -242,3 +242,5 @@
 EXTRA_USERS_PARAMS = " \
   usermod -p '\$1\$UGMqyqdG\$FZiylVFmRRfl9Z0Ue8G7e/' root; \
   "
+
+require conf/machine/include/sample.inc