ALSA: snd-atmel-ac97c: cleanup registers when removing driver

This patch will set the channel A and control channel mode register to
zero before disabling the AC97C peripheral.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/atmel/ac97c.c

@@ -969,6 +969,10 @@ static int __devexit atmel_ac97c_remove(struct platform_device *pdev)
 	if (gpio_is_valid(chip->reset_pin))
 		gpio_free(chip->reset_pin);
 
+	ac97c_writel(chip, CAMR, 0);
+	ac97c_writel(chip, COMR, 0);
+	ac97c_writel(chip, MR,   0);
+
 	clk_disable(chip->pclk);
 	clk_put(chip->pclk);
 	iounmap(chip->regs);