Use OE reference qemuarm

 -Replace qemuphosphor sample bsp with reference qemuarm.
 -Pull in phosphor features via local.conf
diff --git a/conf/distro/openbmc-phosphor.conf b/conf/distro/openbmc-phosphor.conf
index ee457c8..94f1752 100644
--- a/conf/distro/openbmc-phosphor.conf
+++ b/conf/distro/openbmc-phosphor.conf
@@ -25,3 +25,7 @@
         obmc-phosphor-system-mgmt \
         ${DISTRO_FEATURES_LIBC} \
         "
+
+MACHINE_FEATURES += " \
+        ${OBMC_MACHINE_FEATURES} \
+        "