msm8974: Honor input_mic_max_count property when set to 1.

The default value of max_mic_count is 2. max_mic_count is set to
the value specified by the input_mic_max_count property in
audio_platform_info.xml.

Honor the input_mic_max_count property when set to 1. Prior to
this change when max_mic_count this value is 1, the
'source_mic_type' includes SOURCE_DUAL_MIC. For the single mic
case, we don't want that.

Bug: 71773847
Test: Recording on a device with a single microphone uses
      single-mic paths instead of dual mic paths when recording
      flucence/voice or when specifying two mics.

Change-Id: I2b3be6333d4c58a611026ad63bc4178dca0a13ca
diff --git a/hal/msm8974/platform.c b/hal/msm8974/platform.c
index 4addc80..3698a85 100644
--- a/hal/msm8974/platform.c
+++ b/hal/msm8974/platform.c
@@ -1369,7 +1369,7 @@
         dual_mic_config = true;
     }
 
-    my_data->source_mic_type = SOURCE_DUAL_MIC;
+    my_data->source_mic_type = 0;
 
     my_data->fluence_in_spkr_mode = false;
     my_data->fluence_in_voice_call = false;