audio: Add support to enable audio over bg

Add support for BG sound card. Add changes to send BG
codec cal stored in ACDB.

Bug: 73666907
Test: Compile test for 8974 platform, manual test for audio
playback/capture on BG.

Change-Id: I425224efdc2e3d43662f4d4bd521c436daa40ee9
diff --git a/hal/msm8960/platform.c b/hal/msm8960/platform.c
index 6095ea6..9e06a0c 100644
--- a/hal/msm8960/platform.c
+++ b/hal/msm8960/platform.c
@@ -1375,3 +1375,9 @@
 {
     return -1;
 }
+
+int platform_set_acdb_metainfo_key(void *platform __unused,
+                                   char *name __unused,
+                                   int key __unused) {
+    return -ENOSYS;
+}