ASoC: simple-card: don't fail if sysclk setting is not supported

Commit e22579713ae1 ("ASoC: simple card: set cpu-dai sysclk
with mclk-fs") added sysclk / SND_SOC_CLOCK_OUT setting, that makes
asoc_simple_card_hw_params fail if the operation is not supported,
although the intention clearly was to ignore ENOTSUPP. Fix it.

The patch fixes audio playback on Kirkwood / OpenRD client,
where the following errors are seen:

asoc-simple-card sound: ASoC: machine hw_params failed: -524
alsa-lib: /alsa-lib-1.0.28/src/pcm/pcm_hw.c:327:(snd_pcm_hw_hw_params) SNDRV_PCM_IOCTL_HW_PARAMS failed (-524): Unknown error 524

Fixes: e22579713ae1 ("ASoC: simple card: set cpu-dai sysclk with mclk-fs")
Signed-off-by: Aaro Koskinen <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/generic/simple-card.c

···
 		if (ret && ret != -ENOTSUPP)
 			goto err;
 	}
-
+	return 0;
 err:
 	return ret;
 }