ASoC: sta529: Remove redundant I2C_FUNC_SMBUS_BYTE_DATA functionality check

This checking is done by regmap_get_i2c_bus() which is called in
devm_regmap_init_i2c().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>