cml: sof-rt5682: add dmic split

cml/sof-rt5682/HiFi.conf

@@ -21,6 +21,44 @@ SectionVerb {
 	]
 }
 
+# Split 4ch dmic into 2 virtual 2ch mics
+Include.pcm_split.File "/conf.d/dmic-common/split.conf"
+
+Macro [
+	{
+		SplitPCM {
+			Name "cml_stereo_in"
+			Direction Capture
+			Format S32_LE
+			Channels 2
+			HWChannels 4
+			HWChannelPos0 FL
+			HWChannelPos1 FR
+			HWChannelPos2 FL
+			HWChannelPos3 FR
+		}
+	}
+]
+
+Include.ctl_remap.File "/conf.d/dmic-common/remap.conf"
+
+Macro [
+	{
+		CtlRemapStereoVolSw {
+			Dst "Mic 1 Capture"
+			Index0 0
+			Index1 1
+		}
+	}
+	{
+		CtlRemapStereoVolSw {
+			Dst "Mic 2 Capture"
+			Index0 2
+			Index1 3
+		}
+	}
+]
+
 SectionDevice."Speaker" {
 	Comment "Speaker"
 
@@ -69,12 +107,17 @@ SectionDevice."Mic" {
 		CaptureChannelMap "0 1 -1 -1 -1 -1 -1 -1 -1 -1 -1"
 		IntrinsicSensitivity "-2400"
 	}
-	EnableSequence [
+	Macro.pcm_split.SplitPCMDevice {
-		cdev "hw:sofrt5682"
+		Name "cml_stereo_in"
-	]
+		Direction Capture
-	DisableSequence [
+		Device 1
-		cdev "hw:sofrt5682"
+		HWChannels 4
-	]
+		Channels 2
+		Channel0 0
+		Channel1 1
+		ChannelPos0 FL
+		ChannelPos1 FR
+	}
 }
 
 SectionDevice."Headset" {