ALSA: hda: ext: reduce ambiguity between 'multi-link' and 'link' DMA

My esteemed colleagues keep using the same words for different things.

The multi-link structure needs to be handled whether the DSP is
enabled or not.

The host and link DMAs are only relevant when the DSP is enabled.

Things get convoluted when there's an ambiguity between the LOSIDV
settings in the multi-link register space and the selection of the
stream_tag for the link DMA.

Clarify with a rename that the static functions used are related to
the host and link DMAs only.

No functionality change, pure rename.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20221019162115.185917-9-pierre-louis.bossart@linux.intel.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/hda/ext/hdac_ext_stream.c

@@ -224,8 +224,8 @@ int snd_hdac_ext_stream_setup(struct hdac_ext_stream *hext_stream, int fmt)
 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_setup);
 
 static struct hdac_ext_stream *
-hdac_ext_link_stream_assign(struct hdac_bus *bus,
-			    struct snd_pcm_substream *substream)
+hdac_ext_link_dma_stream_assign(struct hdac_bus *bus,
+				struct snd_pcm_substream *substream)
 {
 	struct hdac_ext_stream *res = NULL;
 	struct hdac_stream *hstream = NULL;
@@ -260,8 +260,8 @@ hdac_ext_link_stream_assign(struct hdac_bus *bus,
 }
 
 static struct hdac_ext_stream *
-hdac_ext_host_stream_assign(struct hdac_bus *bus,
-			    struct snd_pcm_substream *substream)
+hdac_ext_host_dma_stream_assign(struct hdac_bus *bus,
+				struct snd_pcm_substream *substream)
 {
 	struct hdac_ext_stream *res = NULL;
 	struct hdac_stream *hstream = NULL;
@@ -329,10 +329,10 @@ struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
 		return hext_stream;
 
 	case HDAC_EXT_STREAM_TYPE_HOST:
-		return hdac_ext_host_stream_assign(bus, substream);
+		return hdac_ext_host_dma_stream_assign(bus, substream);
 
 	case HDAC_EXT_STREAM_TYPE_LINK:
-		return hdac_ext_link_stream_assign(bus, substream);
+		return hdac_ext_link_dma_stream_assign(bus, substream);
 
 	default:
 		return NULL;