bq27x00: Use single i2c_transfer call for property read

static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)

{

	struct i2c_client *client = to_i2c_client(di->dev);

	struct i2c_msg msg;

	struct i2c_msg msg[2];

	unsigned char data[2];

	int ret;

	if (!client->adapter)

		return -ENODEV;

	msg.addr = client->addr;

	msg.flags = 0;

	msg.len = 1;

	msg.buf = data;

	data[0] = reg;

	ret = i2c_transfer(client->adapter, &msg, 1);

	if (ret < 0)

		return ret;

	msg[0].addr = client->addr;

	msg[0].flags = 0;

	msg[0].buf = ®

	msg[0].len = sizeof(reg);

	msg[1].addr = client->addr;

	msg[1].flags = I2C_M_RD;

	msg[1].buf = data;

	if (single)

		msg.len = 1;

		msg[1].len = 1;

	else

		msg.len = 2;

		msg[1].len = 2;

	msg.flags = I2C_M_RD;

	ret = i2c_transfer(client->adapter, &msg, 1);

	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));

	if (ret < 0)

		return ret;