ASoC: soc-pcm: remove snd_soc_dpcm_stream_{lock/unlock}_irq()

soc-pcm.c has snd_soc_dpcm_stream_{lock/unlock}_irq() helper function,
but it is almost nothing help. It just makes a code complex.
Let's remove it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/875xsnll85.wl-kuninori.morimoto.gx@renesas.com


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