iio: accel: kxcjk1013 Fix missing unlock errors

Fix unlock at two places. One when i2c error occurs and other
when trigger set state when raw read is in progress.

kbuild test robot errors:
>> >> drivers/iio/accel/kxcjk-1013.c:531:3-9: preceding lock on line 524
>> >> drivers/iio/accel/kxcjk-1013.c:376:4-10: preceding lock on line 368

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/accel/kxcjk-1013.c

@@ -372,8 +372,10 @@ static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
 			int sleep_val;
 
 			ret = kxcjk1013_set_mode(data, OPERATION);
-			if (ret < 0)
+			if (ret < 0) {
+				mutex_unlock(&data->mutex);
 				return ret;
+			}
 			++data->power_state;
 			sleep_val = kxcjk1013_get_startup_times(data);
 			if (sleep_val < 20000)
@@ -527,8 +529,10 @@ static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
 		kxcjk1013_set_mode(data, OPERATION);
 		++data->power_state;
 	} else {
-		if (--data->power_state)
+		if (--data->power_state) {
+			mutex_unlock(&data->mutex);
 			return 0;
+		}
 		kxcjk1013_chip_setup_interrupt(data, false);
 		kxcjk1013_set_mode(data, STANDBY);
 	}