hal: Reduce debug logs

Remove or mute debug logs that are not necessary in debugging
usual audio HAL issues.

Change-Id: I832d9d95b6b24f64871524efbe65dd57850afd41
diff --git a/hal/audio_extn/hfp.c b/hal/audio_extn/hfp.c
index 3b084ae..bbdbfb5 100644
--- a/hal/audio_extn/hfp.c
+++ b/hal/audio_extn/hfp.c
@@ -545,7 +545,7 @@
     float vol;
     char value[32]={0};
 
-    ALOGD("%s: enter", __func__);
+    ALOGV("%s: enter", __func__);
 
     ret = str_parms_get_str(parms, AUDIO_PARAMETER_HFP_ENABLE, value,
                             sizeof(value));