Move GGP in WSI platform enum

This should have been added at the end to preserve compatibility.
diff --git a/include/vulkan/vk_icd.h b/include/vulkan/vk_icd.h
index 8ad11d7..5e29ef5 100644
--- a/include/vulkan/vk_icd.h
+++ b/include/vulkan/vk_icd.h
@@ -116,12 +116,12 @@
     VK_ICD_WSI_PLATFORM_ANDROID,
     VK_ICD_WSI_PLATFORM_MACOS,
     VK_ICD_WSI_PLATFORM_IOS,
-    VK_ICD_WSI_PLATFORM_GGP,
     VK_ICD_WSI_PLATFORM_DISPLAY,
     VK_ICD_WSI_PLATFORM_HEADLESS,
     VK_ICD_WSI_PLATFORM_METAL,
     VK_ICD_WSI_PLATFORM_DIRECTFB,
     VK_ICD_WSI_PLATFORM_VI,
+    VK_ICD_WSI_PLATFORM_GGP,
 } VkIcdWsiPlatform;
 
 typedef struct {