[media] soc-camera: mt9m111: Fix auto-exposure control

Commit f9bd5843658e18a7097fc7258c60fb840109eaa8 changed V4L2_CID_EXPOSURE_AUTO
from boolean to enum, and commit af8425c54beb3c32cbb503a379132b3975535289
changed the creation of this control into a menu for the mt9m111. However,
mt9m111_set_autoexposure() is still interpreting the value set for this control
as a boolean, which also conflicts with the default value of this control set to
V4L2_EXPOSURE_AUTO (0).
This patch makes mt9m111_set_autoexposure() interpret the value set for
V4L2_CID_EXPOSURE_AUTO as defined by enum v4l2_exposure_auto_type.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Tested-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/i2c/soc_camera/mt9m111.c

@@ -701,11 +701,11 @@ static int mt9m111_set_global_gain(struct mt9m111 *mt9m111, int gain)
 	return reg_write(GLOBAL_GAIN, val);
 }
 
-static int mt9m111_set_autoexposure(struct mt9m111 *mt9m111, int on)
+static int mt9m111_set_autoexposure(struct mt9m111 *mt9m111, int val)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 
-	if (on)
+	if (val == V4L2_EXPOSURE_AUTO)
 		return reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 	return reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 }