$OpenBSD$
Unbreak build.

Index: va/va_backend.h
--- va/va_backend.h.orig
+++ va/va_backend.h
@@ -30,7 +30,11 @@
 #define _VA_BACKEND_H_
 
 #include <va/va.h>
+#ifdef __linux__
 #include <linux/videodev2.h>
+#else
+#include <sys/videoio.h>
+#endif
 
 typedef struct VADriverContext *VADriverContextP;
 typedef struct VADisplayContext *VADisplayContextP;
