Get rid of msr group and make msr_safe devices world read/write.
-SUBSYSTEM=="msr_safe", GROUP="msr", MODE="0660"
-SUBSYSTEM=="msr_batch", GROUP="msr", MODE="0660"
-SUBSYSTEM=="msr_whitelist", GROUP="msr", MODE="0660"
+SUBSYSTEM=="msr_safe", GROUP="root", MODE="0666"
+SUBSYSTEM=="msr_batch", GROUP="root", MODE="0666"
+SUBSYSTEM=="msr_whitelist", GROUP="root", MODE="0664"
