ASoC: rsrc-card: Remove support for setting differing DAI formats

1efb53a2 ("ASoC: simple-card: Remove support for setting differing
DAI formats") removed set_fmt support from simple-card.
rsrc-card follows same style, because it is based on simple-card.

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