ASoC: mediatek: common: refine hw_params and hw_prepare

Refine mtk_afe_fe_hw_params and mtk_afe_fe_prepare by
these helpers.
- mtk_memif_set_enable
- mtk_memif_set_disable
- mtk_memif_set_addr
- mtk_memif_set_channel
- mtk_memif_set_rate
- mtk_memif_set_rate_substream
- mtk_memif_set_format
- mtk_memif_set_pbuf_size

Signed-off-by: Eason Yen <eason.yen@mediatek.com>
Link: https://lore.kernel.org/r/1573814926-15805-3-git-send-email-eason.yen@mediatek.com


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