[ALSA] cmipci: remove invalid channels constraint

Remove the constraint that sets the channel limit for the first playback
device to that of the second one; the first device supports only stereo.

Signed-off-by: Clemens Ladisch <[e-mail]>
Signed-off-by: Jaroslav Kysela <[e-mail]>

sound/pci/cmipci.c

···
 	if ((err = open_device_check(cm, CM_OPEN_PLAYBACK, substream)) < 0)
 		return err;
 	runtime->hw = snd_cmipci_playback;
-	runtime->hw.channels_max = cm->max_channels;
 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 0x10000);
 	cm->dig_pcm_status = cm->dig_status;
 	return 0;