ALSA: ASoC: Fix error paths in N810 machine driver init and release clocks at exit

Thanks to Felipe Balbi <felipe.balbi@nokia.com> by noticing that if clk_get
to sys_clkout2_src fails, then n810_snd_device is never released.

Add also sys_clkout2_src release into error path, error code return and
release the clocks at exit.
Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/omap/n810.c

@@ -329,12 +329,14 @@ static int __init n810_soc_init(void)
 	sys_clkout2_src = clk_get(dev, "sys_clkout2_src");
 	if (IS_ERR(sys_clkout2_src)) {
 		dev_err(dev, "Could not get sys_clkout2_src clock\n");
-		return -ENODEV;
+		err = PTR_ERR(sys_clkout2_src);
+		goto err2;
 	}
 	sys_clkout2 = clk_get(dev, "sys_clkout2");
 	if (IS_ERR(sys_clkout2)) {
 		dev_err(dev, "Could not get sys_clkout2\n");
-		goto err1;
+		err = PTR_ERR(sys_clkout2);
+		goto err3;
 	}
 	/*
 	 * Configure 12 MHz output on SYS_CLKOUT2. Therefore we must use
@@ -343,7 +345,8 @@ static int __init n810_soc_init(void)
 	func96m_clk = clk_get(dev, "func_96m_ck");
 	if (IS_ERR(func96m_clk)) {
 		dev_err(dev, "Could not get func 96M clock\n");
-		goto err2;
+		err = PTR_ERR(func96m_clk);
+		goto err4;
 	}
 	clk_set_parent(sys_clkout2_src, func96m_clk);
 	clk_set_rate(sys_clkout2, 12000000);
@@ -356,20 +359,25 @@ static int __init n810_soc_init(void)
 	gpio_direction_output(N810_SPEAKER_AMP_GPIO, 0);
 
 	return 0;
-err2:
+err4:
 	clk_put(sys_clkout2);
+err3:
+	clk_put(sys_clkout2_src);
+err2:
 	platform_device_del(n810_snd_device);
 err1:
 	platform_device_put(n810_snd_device);
 
 	return err;
-
 }
 
 static void __exit n810_soc_exit(void)
 {
 	gpio_free(N810_SPEAKER_AMP_GPIO);
 	gpio_free(N810_HEADSET_AMP_GPIO);
+	clk_put(sys_clkout2_src);
+	clk_put(sys_clkout2);
+	clk_put(func96m_clk);
 
 	platform_device_unregister(n810_snd_device);
 }