kopper: add win32 loader interface

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16068>

include/kopper_interface.h

@@ -43,6 +43,9 @@
 #ifdef VK_USE_PLATFORM_WAYLAND_KHR
 #include <vulkan/vulkan_wayland.h>
 #endif
+#ifdef VK_USE_PLATFORM_WIN32_KHR
+#include <vulkan/vulkan_win32.h>
+#endif
 
 typedef struct __DRIkopperExtensionRec          __DRIkopperExtension;
 typedef struct __DRIkopperLoaderExtensionRec    __DRIkopperLoaderExtension;
@@ -84,6 +87,9 @@ struct kopper_loader_info {
 #endif
 #ifdef VK_USE_PLATFORM_WAYLAND_KHR
       VkWaylandSurfaceCreateInfoKHR wl;
+#endif
+#ifdef VK_USE_PLATFORM_WIN32_KHR
+      VkWin32SurfaceCreateInfoKHR win32;
 #endif
    };
    int has_alpha;