Revert "hal: update combo device handling"

This reverts commit 993e1f42e79729da2cd80df56072f954ad666b42.

Change-Id: I758f222fdb861feb730b7caba1416ba2e393b5b7
diff --git a/hal/platform_info.c b/hal/platform_info.c
index 21c85a9..92cc930 100644
--- a/hal/platform_info.c
+++ b/hal/platform_info.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -177,7 +177,6 @@
 static void process_backend_name(const XML_Char **attr)
 {
     int index;
-    char *hw_interface = NULL;
 
     if (strcmp(attr[0], "name") != 0) {
         ALOGE("%s: 'name' not found, no ACDB ID set!", __func__);
@@ -197,15 +196,7 @@
         goto done;
     }
 
-    if (attr[4] != NULL) {
-        if (strcmp(attr[4], "interface") != 0) {
-            hw_interface = NULL;
-        } else {
-            hw_interface = (char *)attr[5];
-        }
-    }
-
-    if (platform_set_snd_device_backend(index, attr[3], hw_interface) < 0) {
+    if (platform_set_snd_device_backend(index, attr[3]) < 0) {
         ALOGE("%s: Device %s backend %s was not set!",
               __func__, attr[1], attr[3]);
         goto done;