topology: dmic-generic: add multi-slot WOV build options

Expose the new dmic-wov-multi topology through two non-invasive hooks in
dmic-generic.conf, without disturbing existing single-slot WOV users:

  INCLUDE_WOV "multi": includes dmic-wov-multi.conf, selecting the
    3-slot KPB/arbiter topology.  The existing "true" value continues
    to select the original dmic-wov.conf (single-slot, unchanged).

  DMIC1_ENABLE "wov-multi": includes dmic-wov-multi.conf as an
    alternative DMIC1 pipeline mode, alongside the existing
    "passthrough" and "mfcc" values.

Build the multi-slot WOV topology variant with:
  alsatplg ... -DINCLUDE_WOV=multi

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

tools/topology/topology2/platform/intel/dmic-generic.conf

@@ -96,6 +96,7 @@ IncludeByKey.PASSTHROUGH {
 "false" {
 		IncludeByKey.INCLUDE_WOV {
 			"true"	"platform/intel/dmic-wov.conf"
+			"multi"	"platform/intel/dmic-wov-multi.conf"
 		}
 
 		Object.Pipeline.host-gateway-capture [
@@ -1046,6 +1047,7 @@ IncludeByKey.DMIC0_DEEP_BUFFER {
 }
 
 IncludeByKey.DMIC1_ENABLE {
+	"wov-multi"     "platform/intel/dmic-wov-multi.conf"
 	"passthrough"   "platform/intel/dmic1-passthrough.conf"
         "mfcc"          "platform/intel/dmic1-mfcc.conf"
 }