gpu: nova-core: require Send on FalconEngine and FalconHal

We want to store the GSP and SEC2 falcon instances inside the `Gpu`
structure, but doing so require these types to implement `Send` for
`pci::Driver` to remain implementable on `NovaCore`, which embeds `Gpu`.

All implementors of `FalconEngine` and `FalconHal` satisfy the
requirements of `Send`, and these traits also already required `Sync`,
so this a minor tweak.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250913-nova_firmware-v6-1-9007079548b0@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

drivers/gpu/nova-core/falcon.rs

@@ -286,7 +286,7 @@ pub(crate) struct PFalcon2Base(());
 /// Each engine provides one base for `PFALCON` and `PFALCON2` registers. The `ID` constant is used
 /// to identify a given Falcon instance with register I/O methods.
 pub(crate) trait FalconEngine:
-    Sync + RegisterBase<PFalconBase> + RegisterBase<PFalcon2Base> + Sized
+    Send + Sync + RegisterBase<PFalconBase> + RegisterBase<PFalcon2Base> + Sized
 {
     /// Singleton of the engine, used to identify it with register I/O methods.
     const ID: Self;

drivers/gpu/nova-core/falcon/hal.rs

@@ -13,7 +13,7 @@ mod ga102;
 /// Implements chipset-specific low-level operations. The trait is generic against [`FalconEngine`]
 /// so its `BASE` parameter can be used in order to avoid runtime bound checks when accessing
 /// registers.
-pub(crate) trait FalconHal<E: FalconEngine>: Sync {
+pub(crate) trait FalconHal<E: FalconEngine>: Send + Sync {
     /// Activates the Falcon core if the engine is a risvc/falcon dual engine.
     fn select_core(&self, _falcon: &Falcon<E>, _bar: &Bar0) -> Result {
         Ok(())