hdmi_in_test: Fix compiler warnings.

CRs-Fixed: 2078749
Change-Id: I2fe0fb0d8f974de907f0ee57cfb9fc0d6710bf93
diff --git a/hdmi_in_test/src/hdmi_in_event_test.c b/hdmi_in_test/src/hdmi_in_event_test.c
index 93fea29..1c4d91b 100644
--- a/hdmi_in_test/src/hdmi_in_event_test.c
+++ b/hdmi_in_test/src/hdmi_in_event_test.c
@@ -158,7 +158,7 @@
     return (soc > 0);
 }
 
-void listen_uevent(void *ptr __unused)
+void* listen_uevent()
 {
     char buffer[64*1024];
     struct pollfd fds;