mach-omap2: mux: world-writable debugfs files

Do not create mux debugfs files as world-writable.
Signed-off-by: NVasiliy Kulikov <segoon@openwall.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/mux.c

@@ -605,7 +605,7 @@ static void __init omap_mux_dbg_create_entry(
 	list_for_each_entry(e, &partition->muxmodes, node) {
 		struct omap_mux *m = &e->mux;
 
-		(void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir,
+		(void)debugfs_create_file(m->muxnames[0], S_IWUSR, mux_dbg_dir,
 					  m, &omap_mux_dbg_signal_fops);
 	}
 }