hal: ext_hw_plugin: Fix missing break statement in check usecase

Add missing break statement in ext_hw_plugin_check_plugin_usecase for
USECASE_ICC_CALL case.

Change-Id: I820f01acfe8ed28b55d0418986796539bb635684
diff --git a/hal/audio_extn/ext_hw_plugin.c b/hal/audio_extn/ext_hw_plugin.c
index 5c78caa..cb79537 100644
--- a/hal/audio_extn/ext_hw_plugin.c
+++ b/hal/audio_extn/ext_hw_plugin.c
@@ -201,6 +201,7 @@
         break;
     case USECASE_ICC_CALL:
         *plugin_usecase = AUDIO_HAL_PLUGIN_USECASE_ICC;
+        break;
     default:
         ret = -EINVAL;
     }