google_aec: Clean up kconfig handling

Put the AEC tunables inside an if COMP_GOOGLE_RTC_AUDIO_PROCESSING for
hygine.  This prevents them from appearing in .config files of SOF
builds where AEC was never enabled at all.

Set MOCK via a default instead of select.  Select is unoverridable, it
forces the MOCK to be used whenever COMP_STUBS=y, but it's more
flexible to allow the app to pick and choose which components get
stubbed (STUBS is often set at the platform layer).

Signed-off-by: Andy Ross <[email protected]>

src/audio/google/Kconfig

@@ -15,7 +15,6 @@ config COMP_GOOGLE_HOTWORD_DETECT
 config COMP_GOOGLE_RTC_AUDIO_PROCESSING
 	bool "Google Real Time Communication Audio processing"
 	select COMP_BLOB
-	select GOOGLE_RTC_AUDIO_PROCESSING_MOCK if COMP_STUBS
 	default n
 	help
 	  Select for Google real-time communication audio processing. It
@@ -24,6 +23,8 @@ config COMP_GOOGLE_RTC_AUDIO_PROCESSING
 	  This component takes raw microphones input and playback reference
 	  and outputs an echo-free microphone signal.
 
+if COMP_GOOGLE_RTC_AUDIO_PROCESSING
+
 config COMP_GOOGLE_RTC_AUDIO_PROCESSING_SAMPLE_RATE_HZ
 	depends on COMP_GOOGLE_RTC_AUDIO_PROCESSING
 	int "Sample rate for Google Real Time Communication Audio processing"
@@ -79,10 +80,12 @@ config COMP_GOOGLE_RTC_AUDIO_PROCESSING_MIC_HEADROOM_LINEAR
 
 config GOOGLE_RTC_AUDIO_PROCESSING_MOCK
 	bool "Google Real Time Communication Audio processing mock"
-	default n
+	default y if COMP_STUBS
 	depends on COMP_GOOGLE_RTC_AUDIO_PROCESSING
 	help
 	  Mock Google real-time communication audio processing.
 	  It allows for compilation check and basic audio flow checking.
 
+endif # COMP_GOOGLE_RTC_AUDIO_PROCESSING
+
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