ARM: S5PV210: Add audio platform device in Goni board

After using snd_soc_register_card() in smdk_wm8994.c, the sound
card is registered as a platform driver and it needs related platform
device entry in machine file.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NSangbeom Kim <sbkim73@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s5pv210/mach-goni.c

@@ -859,12 +859,19 @@ static struct s5p_platform_fimc goni_fimc_md_platdata __initdata = {
 	.num_clients	= ARRAY_SIZE(goni_camera_sensors),
 };
 
+/* Audio device */
+static struct platform_device goni_device_audio = {
+	.name = "smdk-audio",
+	.id = -1,
+};
+
 static struct platform_device *goni_devices[] __initdata = {
 	&s3c_device_fb,
 	&s5p_device_onenand,
 	&goni_spi_gpio,
 	&goni_i2c_gpio_pmic,
 	&goni_i2c_gpio5,
+	&goni_device_audio,
 	&mmc2_fixed_voltage,
 	&goni_device_gpiokeys,
 	&s5p_device_mfc,