ASoC: mediatek: common: add some helpers to control mtk_memif

ASoC: mediatek: common: add some helpers to control mtk_memif

1. Add the following helper in mtk-afe-fe-dai to control
to control mtk_memif
- 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

2.extend mtk_base_memif_data struct for new platform

Signed-off-by: Eason Yen <eason.yen@mediatek.com>
Link: https://lore.kernel.org/r/1573814926-15805-2-git-send-email-eason.yen@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>