Just to improve readability.
Spotted by coverity CID 115002 and 115003.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
        case SNDRV_PCM_STATE_DRAINING:
                if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
                        goto __badfd;
+               /* Fall through */
        case SNDRV_PCM_STATE_RUNNING:
                if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
                        break;
        case SNDRV_PCM_STATE_DRAINING:
                if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
                        goto __badfd;
+               /* Fall through */
        case SNDRV_PCM_STATE_RUNNING:
                if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
                        break;