ASoC: SOF: mediatek: mt8195: Add mailbox generic callbacks for IPC

Add the .mailbox_{read,write} generic callbacks for SOF IPC and, while
at it, also change the ipc_msg_data callback to use the SOF API
sof_ipc_msg_data() instead of the custom function mt8195_ipc_msg_data().
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220906092727.37324-4-angelogioacchino.delregno@collabora.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/mediatek/mt8195/mt8195.c

@@ -496,14 +496,6 @@ static int mt8195_get_bar_index(struct snd_sof_dev *sdev, u32 type)
 	return type;
 }
 
-static int mt8195_ipc_msg_data(struct snd_sof_dev *sdev,
-			       struct snd_pcm_substream *substream,
-			       void *p, size_t sz)
-{
-	sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
-	return 0;
-}
-
 static void mt8195_adsp_dump(struct snd_sof_dev *sdev, u32 flags)
 {
 	u32 dbg_pc, dbg_data, dbg_bus0, dbg_bus1, dbg_inst;
@@ -574,6 +566,10 @@ static struct snd_sof_dsp_ops sof_mt8195_ops = {
 	.block_read	= sof_block_read,
 	.block_write	= sof_block_write,
 
+	/* Mailbox IO */
+	.mailbox_read	= sof_mailbox_read,
+	.mailbox_write	= sof_mailbox_write,
+
 	/* Register IO */
 	.write		= sof_io_write,
 	.read		= sof_io_read,
@@ -584,7 +580,7 @@ static struct snd_sof_dsp_ops sof_mt8195_ops = {
 	.send_msg		= mt8195_send_msg,
 	.get_mailbox_offset	= mt8195_get_mailbox_offset,
 	.get_window_offset	= mt8195_get_window_offset,
-	.ipc_msg_data		= mt8195_ipc_msg_data,
+	.ipc_msg_data		= sof_ipc_msg_data,
 	.set_stream_data_offset = sof_set_stream_data_offset,
 
 	/* misc */