vulkan/properties: Document RENAMED_PROPERTIES in the property generator

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26386>

src/vulkan/util/vk_physical_device_properties_gen.py

@@ -41,6 +41,13 @@ def str_removeprefix(s, prefix):
         return s[len(prefix):]
     return s
 
+# Some extensions have been promoted to core, their properties are renamed
+# in the following hashtable.
+# The hashtable takes the form:
+# (VkPhysicalDevice{PropertyStruct}, PropertyName): RenamedPropertyName
+# Drivers just have to fill the RenamedPropertyName field in their struct
+# vk_properties, the runtime will expose the data with the original/right
+# name to consumers.
 RENAMED_PROPERTIES = {
     ("DrmPropertiesEXT", "hasPrimary"): "drmHasPrimary",
     ("DrmPropertiesEXT", "primaryMajor"): "drmPrimaryMajor",