ASoC: soc-pcm: add dpcm_set_be_update_state()

soc-pcm has dpcm_set_fe_update_state() to update FE's runtime_update
(except dpcm_fe_dai_do_trigger() which needs to update it without it).
OTOH, it doesn't have BE's update function.

	O: dpcm_set_fe_update_state()
	X: dpcm_set_be_update_state()

This patch add BE's dpcm_set_fe_update_state()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87zh2k7uz1.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>