ASoC: Remove to support sound for S5P6442

According to removing ARCH_S5P6442, we don't need to support
sound for S5P6442.

Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/sound/soc/samsung/smdk_wm8580.c b/sound/soc/samsung/smdk_wm8580.c
index 8aacf23..3d26f66 100644
--- a/sound/soc/samsung/smdk_wm8580.c
+++ b/sound/soc/samsung/smdk_wm8580.c
@@ -249,7 +249,7 @@
 	int ret;
 	char *str;
 
-	if (machine_is_smdkc100() || machine_is_smdk6442()
+	if (machine_is_smdkc100()
 			|| machine_is_smdkv210() || machine_is_smdkc110()) {
 		smdk.num_links = 3;
 		/* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */