topology2: cavs-rt5682: make BT offload as option

Consider the variant projects with/without bt offload feature
so include BT_OFFLOAD pipelines as an option if needed

Signed-off-by: Mac Chiang <mac.chiang@intel.com>

tools/topology/topology2/cavs-rt5682.conf

@@ -42,7 +42,6 @@
 <dmic-default.conf>
 <hdmi-default.conf>
 <bt-default.conf>
-<bt-generic.conf>
 <input_pin_binding.conf>
 <output_pin_binding.conf>
 <input_audio_format.conf>
@@ -98,6 +97,7 @@ Define {
  GOOGLE_RTC_AEC_REF_SOURCE 'module-copier.8.2'
  HEADSET_PCM_NAME "Headset"
  SPEAKER_PCM_NAME "Speakers"
+ INCLUDE_BT_OFFLOAD true
 }
 
 # override defaults with platform-specific config
@@ -129,6 +129,10 @@ IncludeByKey.GOOGLE_RTC_AEC_SUPPORT {
  "[1]" "platform/intel/google-rtc-aec-reference.conf"
 }
 
+IncludeByKey.INCLUDE_BT_OFFLOAD {
+ "true" "platform/intel/bt-generic.conf"
+}
+
 #
 # List of all DAIs
 #