ab8500-chargalg: Only root should have write permission on sysfs file

Only root should have write permission on sysfs file ab8500_chargalg/chargalg.

Cc: stable@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/power/abx500_chargalg.c b/drivers/power/abx500_chargalg.c
index 2463fa0..f59bc02 100644
--- a/drivers/power/abx500_chargalg.c
+++ b/drivers/power/abx500_chargalg.c
@@ -1711,7 +1711,7 @@
 static struct attribute abx500_chargalg_en_charger = \
 {
 	.name = "chargalg",
-	.mode = S_IWUGO,
+	.mode = S_IWUSR,
 };
 
 static struct attribute *abx500_chargalg_chg[] = {