FSI driver's flag usage was changed/removed by
3449f5fa
(ASoC: fsi: add SND_SOC_DAIFMT_INV_xxx support)
ab6f6d85
(ASoC: fsi: add master clock control functions)

And unused flags had been removed on FSI driver,
but the definition had been kept to avoid compile error.

It is possible to cleanup sh_fsi.h now.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>