regulator: tps65023: Remove duplicate test for I2C_FUNC_SMBUS_BYTE_DATA functionality

Since commit b4226107 ("regmap: i2c: fallback to SMBus if the adapter
does not support standard I2C"), regmap-i2c will check the
I2C_FUNC_SMBUS_[BYTE|WORD]_DATA functionality based on the regmap_config
setting if the adapter does not support standard I2C.

So remove the I2C_FUNC_SMBUS_BYTE_DATA functionality check in the driver code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/tps65023-regulator.c

@@ -211,9 +211,6 @@ static int tps_65023_probe(struct i2c_client *client,
 	int i;
 	int error;
 
-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return -EIO;
-
 	/**
 	 * init_data points to array of regulator_init structures
 	 * coming from the board-evm file.