ALSA: x86: fix spelling mistakes

Fix some spelling mistakes as follows:
regiter ==> register
confgiuration ==> configuration
playabck ==> playback
platoform ==> platform

Signed-off-by: gushengxian <gushengxian@yulong.com>
Link: https://lore.kernel.org/r/20210705073736.662875-1-gushengxian507419@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/x86/intel_hdmi_audio.c

@@ -236,7 +236,7 @@ static void had_write_register(struct snd_intelhad *ctx, u32 reg, u32 val)
  * updating AUD_CONFIG register.
  * This is because:
  * Bit6 of AUD_CONFIG register is writeonly due to a silicon bug on VLV2
- * HDMI IP. As a result a read-modify of AUD_CONFIG regiter will always
+ * HDMI IP. As a result a read-modify of AUD_CONFIG register will always
  * clear bit6. AUD_CONFIG[6:4] represents the "channels" field of the
  * register. This field should be 1xy binary for configuration with 6 or
  * more channels. Read-modify of AUD_CONFIG (Eg. for enabling audio)
@@ -342,7 +342,7 @@ static int had_prog_status_reg(struct snd_pcm_substream *substream,
 
 /*
  * function to initialize audio
- * registers and buffer confgiuration registers
+ * registers and buffer configuration registers
  * This function is called in the prepare callback
  */
 static int had_init_audio_ctrl(struct snd_pcm_substream *substream,
@@ -1790,7 +1790,7 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
 		pcm->private_data = ctx;
 		pcm->info_flags = 0;
 		strscpy(pcm->name, card->shortname, strlen(card->shortname));
-		/* setup the ops for playabck */
+		/* setup the ops for playback */
 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops);
 
 		/* allocate dma pages;

sound/x86/intel_hdmi_audio.h

@@ -96,7 +96,7 @@ struct pcm_stream_info {
  * @had_spinlock: driver lock
  * @aes_bits: IEC958 status bits
  * @buff_done: id of current buffer done intr
- * @dev: platoform device handle
+ * @dev: platform device handle
  * @chmap: holds channel map info
  */
 struct snd_intelhad {