ARM: SAMSUNG: Fix mux bit modification in s3c_adc_select

The mux bits in the adccon register should be cleared only
if muxing is really done in ADCCON and not another register.

This patch introduces a conditional for this.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/plat-samsung/adc.c b/arch/arm/plat-samsung/adc.c
index ee8deef..7821055a 100644
--- a/arch/arm/plat-samsung/adc.c
+++ b/arch/arm/plat-samsung/adc.c
@@ -98,7 +98,8 @@
 
 	client->select_cb(client, 1);
 
-	con &= ~S3C2410_ADCCON_MUXMASK;
+	if (cpu == TYPE_ADCV1 || cpu == TYPE_ADCV2)
+		con &= ~S3C2410_ADCCON_MUXMASK;
 	con &= ~S3C2410_ADCCON_STDBM;
 	con &= ~S3C2410_ADCCON_STARTMASK;