ALSA: pci: rme9652: use snd_pcm_direction_name()

We already have snd_pcm_direction_name(). Let's use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87ttg7k52k.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme9652/hdspm.c

@@ -5610,15 +5610,13 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 	/*
 	   dev_dbg(hdspm->card->dev,
 	   "Allocated sample buffer for %s at 0x%08X\n",
-	   substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
-	   "playback" : "capture",
+	   snd_pcm_direction_name(substream->stream),
 	   snd_pcm_sgbuf_get_addr(substream, 0));
 	   */
 	/*
 	   dev_dbg(hdspm->card->dev,
 	   "set_hwparams: %s %d Hz, %d channels, bs = %d\n",
-	   substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
-	   "playback" : "capture",
+	   snd_pcm_direction_name(substream->stream),
 	   params_rate(params), params_channels(params),
 	   params_buffer_size(params));
 	   */