manta: init: set /d/smb347-regs readable by all

Change-Id: I69693ca6cdf976de04f0a62b1171d55cb072b312
diff --git a/init.manta.rc b/init.manta.rc
index f045fd8..440388f 100644
--- a/init.manta.rc
+++ b/init.manta.rc
@@ -28,6 +28,8 @@
     chmod 0222 /sys/kernel/debug/tracing/trace_marker
     write /sys/kernel/debug/tracing/tracing_on 0
 
+    chmod 0444 /sys/kernel/debug/smb347-regs
+
 on fs
     mount_all /fstab.manta
     setprop ro.crypto.fuse_sdcard true