ALSA: convert sound/* to use module_platform_driver()

This patch converts the drivers in sound/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/arm/pxa2xx-ac97.c

@@ -251,18 +251,7 @@ static struct platform_driver pxa2xx_ac97_driver = {
 	},
 };
 
-static int __init pxa2xx_ac97_init(void)
-{
-	return platform_driver_register(&pxa2xx_ac97_driver);
-}
-
-static void __exit pxa2xx_ac97_exit(void)
-{
-	platform_driver_unregister(&pxa2xx_ac97_driver);
-}
-
-module_init(pxa2xx_ac97_init);
-module_exit(pxa2xx_ac97_exit);
+module_platform_driver(pxa2xx_ac97_driver);
 
 MODULE_AUTHOR("Nicolas Pitre");
 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");

sound/drivers/ml403-ac97cr.c

@@ -1341,15 +1341,4 @@ static struct platform_driver snd_ml403_ac97cr_driver = {
 	},
 };
 
-static int __init alsa_card_ml403_ac97cr_init(void)
-{
-	return platform_driver_register(&snd_ml403_ac97cr_driver);
-}
-
-static void __exit alsa_card_ml403_ac97cr_exit(void)
-{
-	platform_driver_unregister(&snd_ml403_ac97cr_driver);
-}
-
-module_init(alsa_card_ml403_ac97cr_init)
-module_exit(alsa_card_ml403_ac97cr_exit)
+module_platform_driver(snd_ml403_ac97cr_driver);

sound/sh/sh_dac_audio.c

@@ -441,15 +441,4 @@ static struct platform_driver driver = {
 	},
 };
 
-static int __init sh_dac_init(void)
-{
-	return platform_driver_register(&driver);
-}
-
-static void __exit sh_dac_exit(void)
-{
-	platform_driver_unregister(&driver);
-}
-
-module_init(sh_dac_init);
-module_exit(sh_dac_exit);
+module_platform_driver(driver);

sound/sparc/cs4231.c

@@ -2118,15 +2118,4 @@ static struct platform_driver cs4231_driver = {
 	.remove		= __devexit_p(cs4231_remove),
 };
 
-static int __init cs4231_init(void)
-{
-	return platform_driver_register(&cs4231_driver);
-}
-
-static void __exit cs4231_exit(void)
-{
-	platform_driver_unregister(&cs4231_driver);
-}
-
-module_init(cs4231_init);
-module_exit(cs4231_exit);
+module_platform_driver(cs4231_driver);

sound/sparc/dbri.c

@@ -2697,16 +2697,4 @@ static struct platform_driver dbri_sbus_driver = {
 	.remove		= __devexit_p(dbri_remove),
 };
 
-/* Probe for the dbri chip and then attach the driver. */
-static int __init dbri_init(void)
-{
-	return platform_driver_register(&dbri_sbus_driver);
-}
-
-static void __exit dbri_exit(void)
-{
-	platform_driver_unregister(&dbri_sbus_driver);
-}
-
-module_init(dbri_init);
-module_exit(dbri_exit);
+module_platform_driver(dbri_sbus_driver);