software reset for aic32

This patch run a software reset before start to program the
registers. it's also used to allow full reset of the audio
settings on soft reboot.

sound/oss/davinci-audio-aic32.c

@@ -1101,6 +1101,12 @@ static inline void aic32_configure()
 	/* Page select register */
 	audio_aic32_write(PAGE_SELECT_REG, PAGE0);
 
+	/* Self clearing aic32 software reset */
+	audio_aic32_write(SOFT_RESET_REG, SELF_CLEAR_SOFT_RESET);
+
+	/* wait for reset to complete */
+	mdelay(100);
+
 	davinci_set_mono_stereo(aic32_local.nochan);
 
 #ifdef AIC32_MASTER