Fix warnings to upgrade to clang-r468909.

Bug: 241011085
Test: presubmit
Change-Id: Iac3f835f86da3f4e07c3ddbd299c49c72f3b2ba8
diff --git a/ql-tipc/hwbcc.c b/ql-tipc/hwbcc.c
index 10f0bca..6828e0c 100644
--- a/ql-tipc/hwbcc.c
+++ b/ql-tipc/hwbcc.c
@@ -42,7 +42,7 @@
     return TRUSTY_ERR_NONE;
 }
 
-void hwbcc_tipc_shutdown() {
+void hwbcc_tipc_shutdown(void) {
     if (!initialized) {
         return;
     }
diff --git a/test-runner/virtio-console.c b/test-runner/virtio-console.c
index 820fdee..090b97b 100644
--- a/test-runner/virtio-console.c
+++ b/test-runner/virtio-console.c
@@ -181,7 +181,7 @@
     }
 }
 
-struct virtio_console* init_virtio_console() {
+struct virtio_console* init_virtio_console(void) {
     struct virtio_config* console_vio = virtio_probe_console();
     if (!console_vio) {
         /* We didn't find a legacy multiport console */