ASoC: fsi: Add new macro and shift for PortA/B In/Out

Some FSI register have similar bit array for PortA/B and In/Out.
This patch add new macro and shift for it

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>