ASoC: wm8753: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 146568
Addresses-Coverity-ID: 146569
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/wm8753.c

@@ -971,7 +971,7 @@ static int wm8753_pcm_set_dai_fmt(struct snd_soc_codec *codec,
 	case SND_SOC_DAIFMT_CBS_CFS:
 		break;
 	case SND_SOC_DAIFMT_CBM_CFM:
-		ioctl |= 0x2;
+		ioctl |= 0x2; /* fall through */
 	case SND_SOC_DAIFMT_CBM_CFS:
 		voice |= 0x0040;
 		break;
@@ -1096,7 +1096,7 @@ static int wm8753_i2s_set_dai_fmt(struct snd_soc_codec *codec,
 	case SND_SOC_DAIFMT_CBS_CFS:
 		break;
 	case SND_SOC_DAIFMT_CBM_CFM:
-		ioctl |= 0x1;
+		ioctl |= 0x1; /* fall through */
 	case SND_SOC_DAIFMT_CBM_CFS:
 		hifi |= 0x0040;
 		break;