iio:st_sensors: emulate SMBus block read if needed

Use SMBus "block read" protocol only when supported by adapter.
Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/common/st_sensors/st_sensors_i2c.c

@@ -48,7 +48,7 @@ static int st_sensors_i2c_read_multiple_byte(
 	if (multiread_bit)
 		reg_addr |= ST_SENSORS_I2C_MULTIREAD;
 
-	return i2c_smbus_read_i2c_block_data(to_i2c_client(dev),
+	return i2c_smbus_read_i2c_block_data_or_emulated(to_i2c_client(dev),
 							 reg_addr, len, data);
 }