Documentation: nova: update pending tasks

Some tasks, while already having some progress, are still pending, hence
update them.

Link: https://patch.msgid.link/20260119153129.59876-2-dakr@kernel.org
[ Remove PCI config space, as it is completed. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

Documentation/gpu/nova/core/todo.rst

@@ -41,8 +41,15 @@ trait [1] from the num crate.
 Having this generalization also helps with implementing a generic macro that
 automatically generates the corresponding mappings between a value and a number.
 
+FromPrimitive support has been worked on in the past, but hasn't been followed
+since then [1].
+
+There also have been considerations of ToPrimitive [2].
+
 | Complexity: Beginner
 | Link: https://docs.rs/num/latest/num/trait.FromPrimitive.html
+| Link: https://lore.kernel.org/all/cover.1750689857.git.y.j3ms.n@gmail.com/ [1]
+| Link: https://rust-for-linux.zulipchat.com/#narrow/channel/288089-General/topic/Implement.20.60FromPrimitive.60.20trait.20.2B.20derive.20macro.20for.20nova-core/with/541971854 [2]
 
 Generic register abstraction [REGA]
 -----------------------------------
@@ -149,10 +156,13 @@ There is active onging work from Abdiel Janulgue [1] and Lina [2].
 PCI MISC APIs
 -------------
 
-Extend the existing PCI device / driver abstractions by SR-IOV, config space,
-capability, MSI API abstractions.
+Extend the existing PCI device / driver abstractions by SR-IOV, capability, MSI
+API abstractions.
+
+SR-IOV [1] is work in progress.
 
 | Complexity: Beginner
+| Link: https://lore.kernel.org/all/20251119-rust-pci-sriov-v1-0-883a94599a97@redhat.com/ [1]
 
 GPU (general)
 =============
@@ -191,7 +201,10 @@ Some possible options:
     - maple_tree
   - native Rust collections
 
+There is work in progress for using drm_buddy [1].
+
 | Complexity: Advanced
+| Link: https://lore.kernel.org/all/20251219203805.1246586-4-joelagnelf@nvidia.com/ [1]
 
 Instance Memory
 ---------------