ASoC: rt5514-spi: don't use snd_soc_lookup_component()

rt5514-spi can use dev_get_drvdata() to get its component
because it is using snd_soc_component_set_drvdata();

	static int rt5514_spi_pcm_probe(...)
	{
		...
=>		snd_soc_component_set_drvdata(component, ...);
		...
	}

We don't need to use snd_soc_lookup_component() for it.
This patch uses dev_get_drvdata() instead of snd_soc_lookup_component().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>