nir: Add copyright and include guards to nir_vulkan.h

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19950>

src/compiler/nir/nir_vulkan.h

@@ -1,12 +1,46 @@
-/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Jonathan Marek
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 NIR_VULKAN_H
+#define NIR_VULKAN_H
 
 #include "nir.h"
 #include "nir_builder.h"
 #include "vulkan/vulkan_core.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 nir_ssa_def *
 nir_convert_ycbcr_to_rgb(nir_builder *b,
                          VkSamplerYcbcrModelConversion model,
                          VkSamplerYcbcrRange range,
                          nir_ssa_def *raw_channels,
                          uint32_t *bpcs);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* NIR_VULKAN_H */