boards: intel: mtpm: change RTC Audio Processing to module configuration

This patch modifies the configuration of the Google RTC Audio Processing
component from being built-in (`y`) to a loadable module (`m`). This
change allows for more flexibility in managing the component, as it can
now be loaded or unloaded dynamically. The adjustment aligns with the
need for modularity and adaptability in the SOF firmware, especially in
environments where resource management and configuration customization
are critical.

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>

Author: tmleman

app/boards/intel_adsp_ace15_mtpm.conf

@@ -40,7 +40,7 @@ CONFIG_PCM_CONVERTER_FORMAT_FLOAT=y
 # SOF / audio modules / mocks
 # This mock is part of official sof-bin releases because the CI that
 # tests it can't use extra CONFIGs. See #9410, #8722 and #9386
-CONFIG_COMP_GOOGLE_RTC_AUDIO_PROCESSING=y
+CONFIG_COMP_GOOGLE_RTC_AUDIO_PROCESSING=m
 CONFIG_GOOGLE_RTC_AUDIO_PROCESSING_MOCK=y
 
 # SOF / infrastructure