ARM: EXYNOS4: fix improper gpio configuration

These pins are incorrectly configured for PCM2
configure them to SPDIF(_OUT & _EXT_CLK)
Signed-off-by: NNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: NJassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos4/dev-audio.c

@@ -330,7 +330,7 @@ struct platform_device exynos4_device_ac97 = {
 
 static int exynos4_spdif_cfg_gpio(struct platform_device *pdev)
 {
-	s3c_gpio_cfgpin_range(EXYNOS4_GPC1(0), 2, S3C_GPIO_SFN(3));
+	s3c_gpio_cfgpin_range(EXYNOS4_GPC1(0), 2, S3C_GPIO_SFN(4));
 
 	return 0;
 }