audio record patch select from MIC_IN

linux/arch/arm/boot/dts/ark1668e_devb.dts

@@ -416,6 +416,6 @@
 	status = "disabled";
 };
 
-&sdadc {
-	external-i2s;
-};
+//&sdadc {
+//	external-i2s;
+//};