device: samsung: manta: set the perms for secmem node

Change-Id: Iaba0e499a7c20ac2b6cac259fa5c4db96acda84d
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/ueventd.manta.rc b/ueventd.manta.rc
index ea92d97..d179d47 100644
--- a/ueventd.manta.rc
+++ b/ueventd.manta.rc
@@ -93,3 +93,6 @@
 
 # mobicore DRM
 /dev/mobicore             0660   drmrpc     drmrpc
+
+# secure mem driver
+/dev/s5p-smem             0660   drm        drmrpc