ASoC: wm8994: Don't test for NULL before release_firmware()

release_firmware() does its own NULL ptr testing, it's redundant to
also test before calling it.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8994.c

@@ -3977,14 +3977,10 @@ static int  wm8994_codec_remove(struct snd_soc_codec *codec)
 			free_irq(wm8994->micdet_irq, wm8994);
 		break;
 	}
-	if (wm8994->mbc)
 	release_firmware(wm8994->mbc);
-	if (wm8994->mbc_vss)
 	release_firmware(wm8994->mbc_vss);
-	if (wm8994->enh_eq)
 	release_firmware(wm8994->enh_eq);
 	kfree(wm8994->retune_mobile_texts);
-
 	return 0;
 }