hal: apq8098_latv: fix for ac3 audio format through passthrough mode

- Set the property needed for enabling passthrough support.
- Populate audio format correctly for passthrough mode.

Change-Id: Iad4cac87958059237c813c273072b77ee403a9c3
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index d0c0cfa..1699340 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -5148,12 +5148,10 @@
             goto error_open;
         }
 
-        if (out->devices & AUDIO_DEVICE_OUT_AUX_DIGITAL) {
-            if(config->offload_info.format == 0)
-                config->offload_info.format = out->supported_formats[0];
-            if (config->offload_info.sample_rate == 0)
-                config->offload_info.sample_rate = out->supported_sample_rates[0];
-        }
+        if (config->offload_info.format == 0)
+            config->offload_info.format = config->format;
+        if (config->offload_info.sample_rate == 0)
+            config->offload_info.sample_rate = config->sample_rate;
 
         if (!is_supported_format(config->offload_info.format) &&
                 !audio_extn_passthru_is_supported_format(config->offload_info.format)) {