[ALSA] cs4231: remove one busy wait

This busy_wait is not needed after latest changes
to the cs4231-lib

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/isa/cs423x/cs4231_lib.c

@@ -332,7 +332,6 @@ void snd_cs4231_mce_down(struct snd_cs4231 *chip)
 	    !(chip->hardware & (CS4231_HW_CS4231_MASK | CS4231_HW_CS4232_MASK))) {
 		return;
 	}
-	snd_cs4231_busy_wait(chip);
 
 	/*
 	 * Wait for (possible -- during init auto-calibration may not be set)