Update libva headers to the latest release (1.2.1).

third_party/libva/va/wayland/va_wayland_emgd.h

 /*
+ * va_wayland_emgd.h - Wayland/EMGD helpers
+ *
  * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
- *
+ * 
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
- *
+ * 
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-#ifndef _VA_EGL_IMPL_H_
-#define _VA_EGL_IMPL_H_
 
-#define IMPL_MAX_EGL_SURFACE_TARGETS    4
-#define IMPL_MAX_EGL_SURFACE_ATTRIBUTES 8
+#ifndef VA_WAYLAND_EMGD_H
+#define VA_WAYLAND_EMGD_H
 
+#include <stdbool.h>
+#include "va_wayland.h"
+#include "va_backend.h"
+#include "va_backend_wayland.h"
 
 /**
- * Initialize EGL driver context
+ * \brief Initializes Wayland/EMGD layer.
  *
- * @param[in]  dpy        the VA Display
- * @return VA_STATUS_SUCCESS if successful
+ * This is an internal function used to initialize the VA/EMGD subsystem
+ * if the application is running on an EMGD-based server.
+ *
+ * @param[in]   pDisplayContext the VA display context
+ * @return true if successful
  */
-VAStatus va_egl_init_context(VADisplay dpy);
+DLL_HIDDEN
+bool
+va_wayland_emgd_create(VADisplayContextP pDisplayContext);
 
-#endif /* _VA_GLX_IMPL_H_ */
+DLL_HIDDEN
+void
+va_wayland_emgd_destroy(VADisplayContextP pDisplayContext);
+
+#endif /* VA_WAYLAND_EMGD_H */