[media] s3c-camif: fix compiler warnings

Fix these compiler warnings that appeared after switching to gcc-5.1.0:

drivers/media/platform/s3c-camif/camif-capture.c: In function 'sensor_set_power':
drivers/media/platform/s3c-camif/camif-capture.c:118:10: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses]
if (!on == camif->sensor.power_count)
^
drivers/media/platform/s3c-camif/camif-capture.c: In function 'sensor_set_streaming':
drivers/media/platform/s3c-camif/camif-capture.c:134:10: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses]
if (!on == camif->sensor.stream_count)
^

Signed-off-by: Hans Verkuil <[e-mail]>
Cc: Kamil Debski <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/platform/s3c-camif/camif-capture.c

···
 	struct cam_sensor *sensor = &camif->sensor;
 	int err = 0;
 
-	if (!on == camif->sensor.power_count)
+	if (camif->sensor.power_count == !on)
 		err = v4l2_subdev_call(sensor->sd, core, s_power, on);
 	if (!err)
 		sensor->power_count += on ? 1 : -1;
···
 	struct cam_sensor *sensor = &camif->sensor;
 	int err = 0;
 
-	if (!on == camif->sensor.stream_count)
+	if (camif->sensor.stream_count == !on)
 		err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
 	if (!err)
 		sensor->stream_count += on ? 1 : -1;