ASoC: soc-dapm: remove !card check from snd_soc_dapm_set_bias_level()

dapm is setup by snd_soc_dapm_init(), thus dapm->card never been NULL.
We don't need if (!card) check for it.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/877c6ytd9t.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dapm.c

@@ -730,7 +730,7 @@ static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
 	if (ret != 0)
 		goto out;
 
-	if (!card || dapm != &card->dapm)
+	if (dapm != &card->dapm)
 		ret = snd_soc_dapm_force_bias_level(dapm, level);
 
 	if (ret != 0)