The s3c_i2sv2_probe() only enabled iis clock.  Missing prepare isn't
probably fatal, because for SoC clocks this is usually no-op, but for
correctness this clock should be prepared.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Arvind Yadav<arvind.yadav.cs@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>