init: msm8226: Correct the group for pps socket

Socket can only have one group id, so remove the extra group id
to avoid confusion.

Change-Id: Ic6f2abeb73e0eb8cc84073102658655a0fdefae9
diff --git a/init.target.rc b/init.target.rc
index 9ed00ed..a5b1aa2 100644
--- a/init.target.rc
+++ b/init.target.rc
@@ -165,7 +165,7 @@
 service ppd /system/bin/mm-pp-daemon
     class late_start
     user system
-    socket pps stream 0660 system system graphics
+    socket pps stream 0660 system system
     group system graphics
 
 on property:init.svc.surfaceflinger=stopped