ALSA: ASoC: Check for machine type in GTA01 machine driver

Since there are now multiple OpenMoko platforms it is more important to
check that the machine driver is running on the correct system.  This
was orgininally generated as part of the initial GTA02 machine port.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>

sound/soc/s3c24xx/neo1973_wm8753.c

@@ -24,6 +24,7 @@
 #include <sound/soc-dapm.h>
 #include <sound/tlv.h>
 
+#include <asm/mach-types.h>
 #include <asm/hardware/scoop.h>
 #include <mach/regs-clock.h>
 #include <mach/regs-gpio.h>
@@ -716,6 +717,12 @@ static int __init neo1973_init(void)
 
 	DBG("Entered %s\n", __func__);
 
+	if (!machine_is_neo1973_gta01()) {
+		printk(KERN_INFO
+			"Only GTA01 hardware supported by ASoC driver\n");
+		return -ENODEV;
+	}
+
 	neo1973_snd_device = platform_device_alloc("soc-audio", -1);
 	if (!neo1973_snd_device)
 		return -ENOMEM;