ibm: romulus: Set QB_MACHINE

Romulus has a Qemu model called romulus-bmc.

Change-Id: Iea41fc4fcfdb3cea8e2fb9dc286dfca2f304184f
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-ibm/meta-romulus/conf/machine/romulus.conf b/meta-ibm/meta-romulus/conf/machine/romulus.conf
index 5fe2a9b..46e42b6 100644
--- a/meta-ibm/meta-romulus/conf/machine/romulus.conf
+++ b/meta-ibm/meta-romulus/conf/machine/romulus.conf
@@ -17,3 +17,6 @@
 PREFERRED_PROVIDER_virtual/openpower-occ-control-config-native = "romulus-occ-control-config-native"
 PREFERRED_PROVIDER_virtual/phosphor-led-manager-config-native = "romulus-led-manager-config-native"
 PREFERRED_PROVIDER_virtual/phosphor-logging-callouts = "romulus-phosphor-logging-callouts-native"
+
+QB_MACHINE:romulus = "-machine romulus-bmc"
+QB_MEM:romulus = "-m 512"