zink: hook up VK_EXT_descriptor_indexing

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12855>

src/gallium/drivers/zink/zink_device_info.py

@@ -203,6 +203,11 @@ EXTENSIONS = [
 	conditions=["$feats.primitiveTopologyListRestart"]),
     Extension("VK_KHR_dedicated_allocation",
         alias="dedicated"),
+    Extension("VK_EXT_descriptor_indexing",
+        alias="desc_indexing",
+        features=True,
+        properties=True,
+        conditions=["$feats.descriptorBindingPartiallyBound"]),
 ]
 
 # constructor: Versions(device_version(major, minor, patch), struct_version(major, minor))