iio: imu: kmx61: kmx61_set_wake_up_odr() can be static

drivers/iio/imu/kmx61.c:422:5: sparse: symbol 'kmx61_set_wake_up_odr' was not declared. Should it be static?
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/imu/kmx61.c

@@ -419,7 +419,7 @@ static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
 	return 0;
 }
 
-int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
+static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
 {
 	int ret, odr_bits;