sensors: change sysfs attribute permissions

Those attributes used to be writable by world. This change allows
read only access by world.

CRs-Fixed: 382751

Change-Id: I2b37763514a86da9beed3fcb7dcb4706c790e44d
Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
Signed-off-by: Neha Pandey <nehap@codeaurora.org>
diff --git a/drivers/input/misc/mpu3050.c b/drivers/input/misc/mpu3050.c
index 04a7598..db6f93c 100644
--- a/drivers/input/misc/mpu3050.c
+++ b/drivers/input/misc/mpu3050.c
@@ -288,7 +288,7 @@
 
 static struct device_attribute attributes[] = {
 
-	__ATTR(pollrate_ms, 0666,
+	__ATTR(pollrate_ms, 0664,
 		mpu3050_attr_get_polling_rate,
 		mpu3050_attr_set_polling_rate),
 };