ASoC: sh: fsi: Add over/under run counter

Current FSI driver had printed under/over run error
if status register have its error bit.
But runtime print cause the next error
because print out is slow.
This patch add error counter and print error when sound stop

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>