config: intel_adsp: enable TFLM module and C++ dependencies for ace15_mtpm

Enable CONFIG_SOF_STAGING=y, CONFIG_CPP=y, CONFIG_STD_CPP17=y, and
CONFIG_COMP_TENSORFLOW=m in intel_adsp_ace15_mtpm.conf to allow building
the TFLM keyword detection module as an LLEXT module on ARL.

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

Author: lrgirdwo

app/boards/intel_adsp_ace15_mtpm.conf

@@ -17,6 +17,10 @@ CONFIG_FORMAT_CONVERT_HIFI3=n
 CONFIG_SAMPLE_KEYPHRASE=y
 CONFIG_COMP_PHASE_VOCODER=y
 CONFIG_COMP_STFT_PROCESS=y
+CONFIG_SOF_STAGING=y
+CONFIG_CPP=y
+CONFIG_STD_CPP17=y
+CONFIG_COMP_TENSORFLOW=m
 
 # SOF / audio modules / mocks
 # This mock is part of official sof-bin releases because the CI that