[media] media/i2c: fill in missing reg->size fields

Signed-off-by: Hans Verkuil <[e-mail]>
Acked-by: Lad, Prabhakar <[e-mail]>
Cc: Guennadi Liakhovetski <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/ak881x.c

···
 	if (reg->reg > 0x26)
 		return -EINVAL;
 
+	reg->size = 1;
 	reg->val = reg_read(client, reg->reg);
 
 	if (reg->val > 0xffff)

drivers/media/i2c/soc_camera/mt9t031.c

···
 	if (reg->reg > 0xff)
 		return -EINVAL;
 
+	reg->size = 1;
 	reg->val = reg_read(client, reg->reg);
 
 	if (reg->val > 0xffff)

drivers/media/i2c/soc_camera/tw9910.c

···
 	if (reg->reg > 0xff)
 		return -EINVAL;
 
+	reg->size = 1;
 	ret = i2c_smbus_read_byte_data(client, reg->reg);
 	if (ret < 0)
 		return ret;

drivers/media/i2c/tvp7002.c

···
 
 	ret = tvp7002_read(sd, reg->reg & 0xff, &val);
 	reg->val = val;
+	reg->size = 1;
 	return ret;
 }