ASoC: intel: atom: Revert PCM buffer address setup workaround again

We worked around the breakage of PCM buffer setup by the commit
65ca89c2 ("ASoC: intel: atom: Fix breakage for PCM buffer address
setup"), but this isn't necessary since the CONTINUOUS buffer type
also sets runtime->dma_addr since commit f84ba106 ("ALSA:
memalloc: Store snd_dma_buffer.addr for continuous pages, too").
Let's revert the change again.

Link: https://lore.kernel.org/r/20210822072127.9786-1-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>