hal: Add check for afe loopback for send app type config for HFP call

Add check for is afe loop back enabled based on platform file

Change-Id: I24b91db06769486b79a32c00bfb28f7b3ffcb445
diff --git a/hal/msm8960/platform.c b/hal/msm8960/platform.c
index 439b6d7..aa4286f 100644
--- a/hal/msm8960/platform.c
+++ b/hal/msm8960/platform.c
@@ -1223,6 +1223,11 @@
     return -ENOSYS;
 }
 
+int platform_get_is_afe_loopback_enabled(void *platform __unused)
+{
+   return 0;
+}
+
 int platform_set_edid_channels_configuration(void *platform __unused,
                                              int channels __unused,
                                              int backend_idx __unused)