audio: hal: add channel count check for channel mask update

[Issue]: audio record CTS test case AudioNativeTest#testRecordStreamData is failing
[Rootcause]: the existing change is made as part of 10ch FR
and causing CTS test case failure as it is updating
channel mask while audio capture.
[Fix]: added channel count 6 to avoid channel mask update and restore to original
conditional check

Change-Id: I7e2818dc89f91fa3c64f667befe1c76eabd2eb00
diff --git a/hal/audio_extn/audio_extn.c b/hal/audio_extn/audio_extn.c
index b9832bb..247f430 100644
--- a/hal/audio_extn/audio_extn.c
+++ b/hal/audio_extn/audio_extn.c
@@ -3791,7 +3791,7 @@
     int max_mic_count = platform_get_max_mic_count(adev->platform);
     /* validate input params. Avoid updated channel mask if loopback device */
     /* validate input params. Avoid updated channel mask if HDMI or loopback device */
-    if ((channel_count > max_mic_count) &&
+    if ((channel_count == 6) &&
         (in->format == AUDIO_FORMAT_PCM_16_BIT) &&
         (!is_loopback_input_device(get_device_types(&in->device_list)))) {
         switch (max_mic_count) {