beyondx: this is a single-SIM device

* This prevents ril-daemon1 from crashing ril-daemon and cbd

Change-Id: Ib4ce9c10f490766808888aaaecd1c81aac152f4c
diff --git a/vendor.prop b/vendor.prop
index 7ffefc0..8c489c6 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -1,2 +1,5 @@
 ### RIL
 ro.telephony.default_network=26,9
+ro.multisim.simslotcount=1
+ro.vendor.multisim.simslotcount=1
+persist.radio.multisim.config=ss